Jun 20, 2023 ... In this video I'll explain what the easiest methods are to beat every single main level from stereo madness to deadlocked!Jan 29, 2024 · I didn't see this symbol there because it looks more like a staple or upside down "U" on that page. See ->Π, not even close to $\prod$. (Edit: Okay, in the Math.SE font it does. Go look and see!) (Edit_2: Ahh, I was only looking at the HTML style symbols. Didn't even notice the TeX style ones.) $\endgroup$ –Webwhat-does-upside-down-t-mean-in-math 2 Downloaded from admissions.piedmont.edu on 2022-03-05 by guest need to land the job you want: content review, study questions, practice exams in the book and online, digital flashcards, instructional videos, and practical tips for exam Symbolism. The peace symbol, recognized worldwide as a sign for harmony and unity, takes on a thought-provoking twist when it is flipped upside down. This reverse depiction of the iconic symbol carries a powerful message, challenging traditional notions of tranquility and urging individuals to question the true state of peace in our world.Apr 13, 2017 · The inverted form of the therefore sign ( ∴ ∴ ) used in proofs before logical consequences, is known as the because sign ( ∵ ∵ ) and it is used in proofs before reasoning. This symbol just means 'because'. If it was facing up, it means 'therefore'. Kinda feel like this is too short but I guess there's not much to this question.Feb 14, 2024 · I’ve put these statistics symbols into quasi-alphabetical order, so that they are easy to find. When I say quasi-alphabetical, I mean that I have ordered them according to what they look like. For example, the Greek letter Beta (β) looks like the letter b, so you’ll find it in the b section. Same for the letter mu(μ), which looks like the ...The simplest and quickest tool for this is the one you have with you – your bike. Turn your bike upside down and place it across the trail in a place it can be seen by oncoming riders. Hannah ...May 5, 2009 · Mean. In summary, the upside down T symbol, also known as the perpendicular symbol or the "T-perp" symbol, is a mathematical symbol used to indicate perpendicularity between two lines or segments. It is commonly used in geometry and vector calculus to denote perpendicularity or the direction of a vector. It is not a letter or number, and while ... Jun 3, 2017 ... ... t fixed. ... I never thought of it as a bug though- to me it feels like RobTop intentionally changing the physics to make the upside-down ship ...Jun 28, 2013 · The notation for an infinite product is represented by the symbol ∏ and can be interpreted as reading a summation but changing the operation to multiplication. An example is provided to illustrate this concept. The conversation also briefly mentions an upside-down version of the symbol, which is used in abstract algebra and is defined as the ... May 31, 2022 · What does μ mean in math? The lowercase Greek letter mu (µ) is used to represent the prefix multiplier 0.000001 (10 – 6 or one millionth) . For example, 0.000000001 farad or 10 – 9 F of capacitance is commonly written as 0.001 µF.What does three dots in a upside down triangle mean? SYMBOLS USED IN WRITINGThree dots in a non-inverted triangle shape ( ∴ ) means 'therefore.'Three dots in an upside-down triangle shape ( ∵ ) means 'because'.SAFETY SYMBOLS∵ is also used to mark a "threat".For more information, see Related …Feb 1, 2024 · Here are some key elements to remember: Statements and reasons: Organize your proof with each statement supported by a reason. The Segment Addition Postulate ( A B + B C = A C if B is between A and C) and the Angle Addition Postulate are foundational tools. The structure of the proof is also important. I may use a two-column proof, where …What does an upside down American flag mean? What does it mean to take out a negative sign from parenthesis? What does this symbol mean ^? What does the symbol ~ represent in the statement X ~ b(n, p)? What is meant by translation in maths? Using v= u+at, find v if u = 0, a = 15m/s^2 and t = 5s; Given 2u + v =4 , express variable v in terms of ... Feb 13, 2014 ... How do you determine two triangles are similar using angle angle aa ... Geometric Mean Theorems Altitude and Leg. Mario's Math Tutoring•3.9K ...a31 a32 a33. = a11 (a22a33 − a23a32) − a12 (a21a33 − a23a31) + a13 (a21a32 − a22a31) three steps. 1) I use this formula and apply it to my original matrix. 2) I use that formula and apply it to the 3x3 identity matrix. 3) the values i get from those, i plus in to the question.It is a semantic statement rather than a syntactic one. Syntax is the level of propositional calculus in which A, B, A ∧ B A, B, A ∧ B live. Semantics is at a higher level, where we assign truth values to propositions based on interpreting them in a larger universe. Your (1), (A ∧ B) → C ( A ∧ B) → C, is a proposition.Dec 24, 2021 · T means the set of Tennis players. V means the set of Volleyball players. The Venn Diagram is now like this: Union of 3 Sets: S ∪ T ∪ V. You can see (for example) that: drew plays Soccer, Tennis and …Dec 24, 2022 ... In this video I explain what every level of Geometry Dash introduces, and why the 2.2 sneak peeks concern me ... t Let Go 6:09 - (7) Jumper 6:35 - ..."Bisect" means to divide into two equal parts. You can bisect lines, angles, and more. The dividing line is called the "bisector" Bisecting a Line Segment. Here the blue line segment is bisected by the red line: You can try it yourself (try moving the points):Jan 4, 2024 · The two rules for function reflection are these: To reflect the graph of a function h(x) over the x -axis (that is, to flip the graph upside-down), multiply the function by −1 to get −h(x). To reflect the graph of a function h(x) around the y -axis (that is, to mirror the two halves of the graph), multiply the argument of the function by ...Nov 14, 2022 · In Math what does the upside down T mean or stand for? The Upside down T symbol indicates perpendicular lines. What does pnworhd mean? pnworhd is an upside down pyramid. If you take pnworhd in ...4 days ago · Portals are special objects in Geometry Dash, Geometry Dash Lite, Geometry Dash Meltdown, Geometry Dash World and Geometry Dash SubZero. They modify how the level is interacted with as well as change the icon into different forms, each with unique gameplay. Notes 1 Substitutes the ship in platformer levels 2 Form introduced at the start …Jan 23, 2024 · I am looking for a Latex command to print the mathematical contradiction symbol, which is the upside-down T. Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.The King of Swords is the fourteenth card in the Suit of Swords (also known as the suit of blades) and one of the fifty-six suit cards from the minor arcana. In divinatory tarot, the Suit of Swords is associated with thought, intellect, mental strength, and integrity. They can also represent conflict, hardship, and misfortune.Jun 15, 2017 · I'm aware it's used as an "and" in logic, but that doesn't seem to fit the context. "Wedge product" or "exterior algebra" would be good search terms. It is the wedge product. Progress through obfuscation. Jun 15, 2017 at 16:19. The latex-symbol is "wedge", i.e., ∧, or . So it is the "wedge product".Dec 19, 2017 ... Your browser can't play this video. Learn more ... (Geometry) Line Symmetry and Rotational Symmetry Lesson. MATHfisch•196K views · 6:41. Go to ...What Does the Upside Down T Mean in Math? Mathematics seems to throw letters our way on occasion, despite consisting primarily of numbers. We can forgive this in algebra, but when those letters seem to twist into strange symbols like the upside-down T, many of us feel lost all over again. The upside-down T (or ⊥) refers to perpendicular lines ... A swinger is someone in a non-monogamous long-term or married relationship, where consensual partner-swapping is part of their dynamic. For an official swingers definition, according to Dictionary ...Inverted T waves are normal in some leads but abnormal in other leads. These T wave findings are nonspecific but may be seen in coronary artery disease, cardiac enlargement,many metabolic disturbances,etc. Your physician who knows all the findings and information about your condition is best qualified to determine the significance of the …Jun 15, 2017 · I'm aware it's used as an "and" in logic, but that doesn't seem to fit the context. "Wedge product" or "exterior algebra" would be good search terms. It is the wedge product. Progress through obfuscation. Jun 15, 2017 at 16:19. The latex-symbol is "wedge", i.e., ∧, or . So it is the "wedge product".Inverted T waves are normal in some leads but abnormal in other leads. These T wave findings are nonspecific but may be seen in coronary artery disease, cardiac enlargement,many metabolic disturbances,etc. Your physician who knows all the findings and information about your condition is best qualified to determine the significance of the …Nov 21, 2023 · In math, the symbol U represents the union of two sets, while upside-down U represents the intersection of the sets. What is the U symbol in math? In math, the …Claim: Rapper Ice Spice wore an upside-down "satanic" cross at the 2024 Super Bowl.If it is, it means Union. If it does not, it means intersection. To remember what words go with the symbols, I think of the way the U is facing aswell. If the U is upside down and the two lines are facing the bottom, I think of it as "and" because there are two lines. I hope that makes sense. Apr 5, 2022 · The Upside Down t letter symbol is a text symbol that can easily copy and paste into any social media, website, and emails. The following table shows the name and meaning of the upside down symbols along with the HTML code (hexadecimal and decimal) and Unicode. To copy these codes, click on code. Upside Down Symbol. Name.What does upside down U mean? Intersect “Intersect” is represented by an upside down U. The intersection is where the circles overlap. “Union” is represented by a right-side up U. The union is the entire area of both circles. What does ∩ mean in statistics? intersections The intersection of events A Definition: intersections.Here is a list of commonly used mathematical symbols with names and meanings. Also, an example is provided to understand the usage of mathematical symbols. x ≤ y, means, y = x or y > x, but not vice-versa. a ≥ b, means, a = b or a > b, but vice-versa does not hold true. .upside down: [adverb] in such a way that the upper and the lower parts are reversed in position.Nov 29, 2012 · The upside down capital T means <perpendicular>, both in elementary geometry and in linear algebra (or functional analysis). A to the power T upside dowm is …May 9, 2014 · What does the inverted V represent in math. I know that A V B represents Logical disjunction which means A OR B and the result of it is false only when both A and B are false . But I still didn't understand what an inverted V means as shown in the image below. I know that cij , ail and blj are cells in a matrix but I dont understand the meaning ... Apr 28, 2022 · What does T squared and T squared mean? T squared is T times T. T squared and T squared appears to be the addition of T squared with itself. That answer would be 2T squared or 2T^2Oct 1, 2022 · What does three dots in a upside down triangle mean? SYMBOLS USED IN WRITINGThree dots in a non-inverted triangle shape ( ∴ ) means 'therefore.'Three dots in an upside-down triangle shape ( ∵ ) means 'because'.SAFETY SYMBOLS∵ is also used to mark a "threat".For more information, see Related …Apr 28, 2022 · What do the letters h u n o s x and z have in common? They are also letters upside down: y n u o s x and z Comment: Don't think that's it. Y is not an upside-down h. If this is it, c and l are missing from the set, and you'd have to allow p as an upside-down b. Besides, the answer could involve the capital letters instead.It is not possible. You cannot skip your Algebra 1 subject since it is a prerequisite for your upcoming subjects like Geometry, Algebra 2 and calculus. You can do better. Don` loose hope. If don`t do well on your placement test you can ask your mom to get you a math tutor. In this way, you can focus more on the subject that you feel you are not good or don`t …Apr 28, 2022 · What does an upside-down T mean? It is the symbol for 'perpendicular'. Nov 13, 2018 ... This tutorial discusses what negative reciprocals are and how that relates to slopes of perpendicular line segments.strict inequality. less than. 4 < 5. 4 is less than 5. ≥. inequality. greater than or equal to. 5 ≥ 4, x ≥ y means x is greater than or equal to y. Aug 28, 2023 · In Math what does the upside down T mean or stand for? The Upside down T symbol indicates perpendicular lines. What does pnworhd mean? pnworhd is an upside down pyramid. If you take pnworhd in ...Math what does upside down question mark mean Which class is harder at california state university, northridge math 103- business calculus or math 150a- calculus i or math 255a- calculus for the l What is a 4 pics one word: 7 letter word with a race car, board with math problems, a drop of water that says h2o and a baby drinking mild with its... Apr 28, 2022 · What does the upside down T symbol mean? The Cross of St. Peter or Petrine Cross is an inverted Latin cross traditionally used as a Christian symbol, but in recent times also used widely as an ...Define the term 'equation' and then explain what it means to solve an equation. Identify the property illustrated in this equation. 9 + (2 + w) = (9 + 2) + w. Identify the property illustrated in this equation. x + 3 + 8 = 3 + x + 8. Identify the property illustrated in this equation. 2 (xy) = (2x)y. Identify the property illustrated in this ...Nov 21, 2023 · Universal Sets. In math, the universal set is the set of all elements (usually, numbers) under consideration, without any repetition of elements. By convention, the universal set is denoted by the ... The symbol is an upside down U like this: ∩ Example: The intersection of the "Soccer" and "Tennis" sets is just casey and drew (only casey and drew are in both sets), which can be written: Soccer ∩ Tennis = {casey, drew} Dec 3, 2023 · Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents. ... means all the numbers between 0 and 20, do not include 0, but do include 20 . All Three Methods Together. ... The Intersection symbol is an upside down "U" like this: ...May 5, 2009 · Mean. In summary, the upside down T symbol, also known as the perpendicular symbol or the "T-perp" symbol, is a mathematical symbol used to indicate perpendicularity between two lines or segments. It is commonly used in geometry and vector calculus to denote perpendicularity or the direction of a vector. It is not a letter or number, and while ... The ⇒ symbol is often used in text to mean "result" or "conclusion", as in "We examined whether to sell the product ⇒ We will not sell it". Also, the → symbol is often used to denote "changed to", as in the sentence "The interest rate changed. March 20% → April 21%". See also. Philosophy portal; Józef Maria Bocheński what-does-an-upside-down-t-mean-in-geometry 2 Downloaded from admissions.piedmont.edu on 2022-11-04 by guest complexity of matrix multiplication. The first is also a leading candidate for the greatest unsolved problem in mathematics. The second is of enormous practical and theoretical importance. Algebraic geometry and representation theory ... Dec 21, 2023 · Learn how to identify and calculate perpendicular lines in geometry, a type of line that intersects to form right angles. The symbol ⊥ means is perpendicular to and the symbol ∠ means an angle. See …What is the upside down caret called? An upside-down circumflex is called a caron, or a háček. It has an HTML entity in the TADS Latin-2 extension to HTML: ˇ and looks like this: ˇ which unfortunately doesn't display in the same size/proportion as the ^ caret. Or you can use the unicode U+30C . In mathematics, translation means moving an object from one location to another. It is a term often used in geometry. In translation, the object is moved without rotating, reflecti...Depending on where the doji occurs, each one provides different information to the trader. A doji could look like a plus sign, a T, or an upside-down T. In certain contexts, a doji candlestick could indicate that the price is near a topping or bottoming point. At other times, it means that the price may move sideways.Inverted T waves are normal in some leads but abnormal in other leads. These T wave findings are nonspecific but may be seen in coronary artery disease, cardiac enlargement,many metabolic disturbances,etc. Your physician who knows all the findings and information about your condition is best qualified to determine the significance of the …Dec 21, 2022 · In Math what does the upside down T mean or stand for? The Upside down T symbol indicates perpendicular lines. ... But that is the best I can do.Picture an upside down capital letter "T". I'm a ... The del operator is what is known as a vector operator. It is similar to a vector, except it has now quantity on its own, it can only operate on other vectors or vector fields. Del is used to find the gradient of a function, the curl and divergence of a vector field, and many other properties of multi-dimensional functions.What does an upside down American flag mean? What does it mean to take out a negative sign from parenthesis? What does this symbol mean ^? What does the symbol ~ represent in the statement X ~ b(n, p)? What is meant by translation in maths? Using v= u+at, find v if u = 0, a = 15m/s^2 and t = 5s; Given 2u + v =4 , express variable v in terms of ... Apr 25, 2022 · What does upside down t mean in linear algebra? The upside down capital T means , both in elementary geometry and in linear algebra (or functional analysis). A to the power T upside dowm is the subset B of M made up of all y in M, such that whatever x from the subset A of M, = 0, where (M,<,>) is a scalar product space. Cadence Design Systems (CDNS) Has the Right Tempo for Further Upside...CDNS Shares of engineering and software company Cadence Design Systems (CDNS) have surged in the past couple ...Sep 14, 2023 · What does it mean when an umbrella is upside down? Usually an upside down umbrella catching raindrops or tears is seen as a sign of compassion. In both Hinduism and Buddhism, umbrellas or parasols ...Adobe (ADBE) Stock Is Making a Major Upside Breakout...ADBE This week's earnings include those from Adobe (ADBE) , which has its finger on the pulse of the cloud. Adobe is due to r...It is not possible. You cannot skip your Algebra 1 subject since it is a prerequisite for your upcoming subjects like Geometry, Algebra 2 and calculus. You can do better. Don` loose hope. If don`t do well on your placement test you can ask your mom to get you a math tutor. In this way, you can focus more on the subject that you feel you are not good or don`t …Here’s a quick overview of how to use Upside. Step 1: Sign up. Download the free app for iOS or Android, then sign up. Step 2: Activate an offer. If you forget to activate the offer before making your purchase, you will not receive a cashback reward. To activate, click “Claim” (as shown in the image below).Jan 28, 2024 · What does that mean? Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.May 5, 2009 · Mean. In summary, the upside down T symbol, also known as the perpendicular symbol or the "T-perp" symbol, is a mathematical symbol used to indicate perpendicularity between two lines or segments. It is commonly used in geometry and vector calculus to denote perpendicularity or the direction of a vector. It is not a letter or number, and while ... What does it mean when an umbrella is upside down? Usually an upside down umbrella catching raindrops or tears is seen as a sign of compassion. In both Hinduism and Buddhism, umbrellas or parasols are a symbol of wisdom.Jan 7, 2024 · We know the definition of the gradient: a derivative for each variable of a function. The gradient symbol is usually an upside-down delta, and called “del” (this makes a bit of sense – delta indicates change in …May 31, 2022 · What does ∩ mean in Venn diagrams? Intersection of two sets A complete Venn diagram represents the union of two sets. ∩: Intersection of two sets. The intersection shows what items are shared between categories. What does the upside down U mean? Intersect “Intersect” is represented by an upside down U. The intersection is where the ...It is not possible. You cannot skip your Algebra 1 subject since it is a prerequisite for your upcoming subjects like Geometry, Algebra 2 and calculus. You can do better. Don` loose hope. If don`t do well on your placement test you can ask your mom to get you a math tutor. In this way, you can focus more on the subject that you feel you are not good or don`t …Apr 28, 2022 · In math what does the upside down U mean? Intersection. This is used in set theory to refer to those members of two sets which are common to both. e.g. the intersection of { p a n s y } and { p r i m u l a } is { p a } In a Venn diagram (a graphical representation of sets) it is the overlap of two shapes.Here’s a quick overview of how to use Upside. Step 1: Sign up. Download the free app for iOS or Android, then sign up. Step 2: Activate an offer. If you forget to activate the offer before making your purchase, you will not receive a cashback reward. To activate, click “Claim” (as shown in the image below).Jan 23, 2022 · The sideways V symbol is also known as the "greater than" symbol – more formally known as the “greater than or equal to” symbol – and it's used in mathematics to indicate that one number is greater than or equal to another. This symbol is essential for writing comparison statements in math, and it can be found in a variety of equations ... But wait, shouldn’t this (at least in part) be corrected by the 0.1mm tolerance of the headlight brick? Good question! The answer in this case is no. The headlight brick is designed to be exactly two plates thick in its shortest dimension, so it is curious in the fact that it doesn’t have a 0.1mm tolerance!Jun 24, 2018 · For example, a lower case λ λ may be considered an upside down y as it seems like a flipped y, but it does not seem so if it is rotated 180 degrees. Could mean either. Unless the context makes it crystal clear, it's better to specify. Perpendicular lines are lines, segments or rays that intersect to form right angles. The symbol ⊥ ⊥ means is perpendicular to . The right angle symbol in the figure indicates that the lines are perpendicular. In three dimensions, you can have three lines which are mutually perpendicular. The rays PT−→−,TU−→− P T →, T U → and ... Though the stock market tumble has been scary, there are some unexpected upsides to the bad news. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and...Dec 26, 2015 · 5. The notation ∴ (written as \therefore) is shorthand for the word therefore. Since the symbol connects cause and effect, the symbol is pretty common and thus has a common abbreviation. This link has a list of more logic symbols, such as ∀ (for all). Also, the upside-down version of the symbol is used to mean "because".Dec 26, 2015 · 5. The notation ∴ (written as \therefore) is shorthand for the word therefore. Since the symbol connects cause and effect, the symbol is pretty common and thus has a common abbreviation. This link has a list of more logic symbols, such as ∀ (for all). Also, the upside-down version of the symbol is used to mean "because".Adobe (ADBE) Stock Is Making a Major Upside Breakout...ADBE This week's earnings include those from Adobe (ADBE) , which has its finger on the pulse of the cloud. Adobe is due to r...The star is the seventeenth tarot card (XVII) in the major arcana. In terms of numerology, 17 becomes 1+7 = 8. The number 8 represents not only your strength of will but also the ability to manifest your hopes and dreams. When pulled in the upright position, The Star is associated with inspiration, hope, healing, and positivity.Apr 1, 2023 · 1. Determining Right Angles: The most common use of the upside-down T symbol in geometry is to determine right angles. By drawing an upside down T symbol at …Apr 28, 2022 · What do the letters h u n o s x and z have in common? They are also letters upside down: y n u o s x and z Comment: Don't think that's it. Y is not an upside-down h. If this is it, c and l are missing from the set, and you'd have to allow p as an upside-down b. Besides, the answer could involve the capital letters instead.It is a semantic statement rather than a syntactic one. Syntax is the level of propositional calculus in which A, B, A ∧ B A, B, A ∧ B live. Semantics is at a higher level, where we assign truth values to propositions based on interpreting them in a larger universe. Your (1), (A ∧ B) → C ( A ∧ B) → C, is a proposition.
Origins of the Upside-Down Question Mark. In the 1754, the Real Academia Española (Spanish Royal Academy) declared that a signo de apertura de interrogación (opening question mark) must be used at the beginning of all questions.In Spanish, it can be very difficult to distinguish questions from statements. For example, take a look at the …. 10 day weather forecast in raleigh nc
"Bisect" means to divide into two equal parts. You can bisect lines, angles, and more. The dividing line is called the "bisector" Bisecting a Line Segment. Here the blue line segment is bisected by the red line: You can try it yourself (try moving the points):A convenient guide for Geometric Dimensioning and Tolerancing (GD&T) symbols at your fingertips. ... Regardless of feature size simply means that whatever GD&T ...On a graph, a line which is approached by a curve but never reached. atom. A basic unit of matter consisting of ...Feb 8, 2024 · The upside-down capital delta symbol del , also called "nabla" used to denote the gradient and other vector derivatives. The following table summarizes the names and notations for various vector derivatives. symbol vector derivative del gradient del ^2 Laplacian or vector Laplacian del _(u) or s^^·del directional derivative del · divergence …What is the meaning of upside down delta symbol quora triangle an lbgtq aura company home facebook converse pythagorean theorem why does mean change in physics a triangular 3 dots abc similar to def lesson explainer forces nagwa alt code shortcuts for symbols webnots v math copy and paste fb pascal s contemporary society …What does three dots in a upside down triangle mean? SYMBOLS USED IN WRITINGThree dots in a non-inverted triangle shape ( ∴ ) means 'therefore.'Three dots in an upside-down triangle shape ( ∵ ) means 'because'.SAFETY SYMBOLS∵ is also used to mark a "threat".For more information, see Related …Nov 29, 2012 · The upside down capital T means <perpendicular>, both in elementary geometry and in linear algebra (or functional analysis). A to the power T upside dowm is the subset B of M made up of all y in M, such that whatever x from the subset A of M, <x,y> = 0, where (M,<,>) is a scalar product space.The point at which two mathematical objects overlap is their intersection. The point or group of points at which two or more geometric objects cross is known as the intersection of those objects. The intersection of two sets is comprised of every number or object that both of those sets share. This can apply to numerical or non-numerical sets. Apr 1, 2023 · 1. Determining Right Angles: The most common use of the upside-down T symbol in geometry is to determine right angles. By drawing an upside down T symbol at …Goldfish swim upside down when they have swim bladder disease. Goldfish and other species of fish may also swim sideways or do not have the ability to swim to the bottom of the tan...Sep 14, 2023 · What does it mean when an umbrella is upside down? Usually an upside down umbrella catching raindrops or tears is seen as a sign of compassion. In both Hinduism and Buddhism, umbrellas or parasols ...Jan 23, 2024 · I am looking for a Latex command to print the mathematical contradiction symbol, which is the upside-down T. Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.See full list on mathvault.ca what does the upside down T mean. In geometry, it means “is perpendicular to”. What symbol is an upside down T? Perpendicular lines Linear Relationships Perpendicular lines intersect at a right angle. Rather than writing out the words ‘parallel’ and ‘perpendicular,’ we use geometric notation. The symbol for two parallel lines is two ....