# FAQ: What is a triangle?

## How do you define a triangle?

In geometry, a triangle is a closed, two-dimensional shape with three straight sides. A triangle is also a polygon.

## What is the best definition of a triangle?

A triangle is a three-sided polygon that closes in a space. It uses lines, line segments or rays (in any combination) to form the three sides. When three sides form and meet, they create three vertices, or corners.

## What are the 3 sides of triangle?

There are three types of triangle based on the length of the sides: equilateral, isosceles, and scalene.

## What is a triangle in math?

In Geometry, a triangle is a three-sided polygon that consists of three edges and three vertices. The most important property of a triangle is that the sum of the internal angles of a triangle is equal to 180 degrees.

## What are parts of a triangle?

A triangle is a shape formed when three straight lines meet. All triangles have three sides and three corners (angles). The point where two sides of a triangle meet is called a vertex. The base of a triangle can be any one of its three sides, but it is usually the bottom one.

## What are the 7 triangles?

To learn about and construct the seven types of triangles that exist in the world: equilateral, right isosceles, obtuse isosceles, acute isosceles, right scalene, obtuse scalene, and acute scalene.

## What is another name for Triangle?

In this page you can discover 20 synonyms, antonyms, idiomatic expressions, and related words for triangle, like: pyriform, pyramid, deltoid, triangular, trigon, set-square, deltoidal, trigonal, triangulum, trilateral and pyramidal.

## Does 4 5 6 make right triangles?

The three numbers 4, 5, 6 make a Pythagorean Triple (they could be the sides of a right triangle).

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## What is the side of a triangle called?

Every triangle has three sides and three angles, some of which may be the same. The sides of a triangle are given special names in the case of a right triangle, with the side opposite the right angle being termed the hypotenuse and the other two sides being known as the legs. All triangles are convex and bicentric.

## How do you find the side of a triangle given two sides?

Boundless Algebra

1. The Pythagorean Theorem, a2+b2=c2, a 2 + b 2 = c 2, can be used to find the length of any side of a right triangle.
2. The side opposite the right angle is called the hypotenuse (side c in the figure).
3. The Pythagorean Theorem, also known as Pythagoras’ Theorem, is a fundamental relation in Euclidean geometry.
4. a2+b2=c2.

## What does the symbol Δ mean?

Delta Symbol: Change

Uppercase delta (Δ) at most times means “change” or “the change” in maths. Consider an example, in which a variable x stands for the movement of an object. So, “Δx” means “the change in movement.” Scientists make use of this mathematical meaning of delta in various branches of science.

## What are the rules of a triangle?

Properties of a triangle

• A triangle has three sides, three angles, and three vertices.
• The sum of all internal angles of a triangle is always equal to 180. This is called the angle sum property of a triangle.
• The sum of the length of any two sides of a triangle is greater than the length of the third side.

## What is the size of a triangle?

Each small triangle is exactly half its small rectangle. In other words: the size of our triangle is exactly half the size of the rectangle. So, if you want to measure a triangle, you just multiply its base b times its height h, and then divide by two.