A triangle is **a 3-sided polygon sometimes** (but not very commonly) called the trigon. Every triangle has three sides and three angles, some of which may be the same. The study of triangles is sometimes known as triangle geometry, and is a rich area of geometry filled with beautiful results and unexpected connections.

Contents

- 1 What is the definition of a triangle in geometry?
- 2 What is the best definition of a triangle?
- 3 What is a triangle in simple words?
- 4 What is called triangle?
- 5 What does ∆ mean?
- 6 How do you explain a triangle?
- 7 How do you know if a triangle is a triangle?
- 8 What is an example of a triangle?
- 9 What is true triangle?
- 10 Do triangles have 4 sides?
- 11 What angles make a triangle?
- 12 Do triangles have equal sides?
- 13 What is triangle Class 8?
- 14 How do you name a triangle in geometry?
- 15 What is triangle Class 9?

## What is the definition of a triangle in geometry?

1: a flat geometric figure that has three sides and three angles. 2: something that has three sides and three angles a triangle of land.

## What is the best definition of a triangle?

The definition of a triangle is a shape with three angles and three sides. An example of something in the shape of a triangle is a piece of pizza.

## What is a triangle in simple words?

A triangle is a shape, or a part of two dimensional space. It has three straight sides and three vertices. The three angles of a triangle always add up to 180° (180 degrees). It is the polygon with the least possible number of sides.

## What is called triangle?

A simple closed curve or a polygon formed by three line-segments (sides) is called a triangle. The above shown shapes are triangles. The symbol of a triangle is ∆. A triangle is a polygon with three sides. Triangles can be classified on the basis of sides and angles.

## What does ∆ mean?

∆: Means “ change” or “difference ”, as in the equation of a line’s slope: 2. 1. 2.

## How do you explain a triangle?

A triangle has three sides, three vertices, and three angles. The sum of the three interior angles of a triangle is always 180°. The sum of the length of two sides of a triangle is always greater than the length of the third side.

## How do you know if a triangle is a triangle?

All you have to do is use the Triangle Inequality Theorem, which states that the sum of two side lengths of a triangle is always greater than the third side. If this is true for all three combinations of added side lengths, then you will have a triangle.

## What is an example of a triangle?

Traffic signs form the most commonly found examples of the triangle in our everyday life. The signs are in equilateral triangular shape; which means that all three sides are of equal lengths and have equal angles.

## What is true triangle?

(0) Triangle Kush is an indica originating in Florida, named after the state’s three cannabis-producing capitals: Jacksonville, Miami, and Tampa. Indoor or outdoor grows are low yielders, but clear, active effects stimulating creativity and discussion drive this strain’s production.

## Do triangles have 4 sides?

The triangle has three (3) sides. The triangle is a polygon that contains three sides and three inner angles and three vertices. Additional Information: A triangle is a primitive form of geometry (polygon) that can only have three sides in its simplest form.

## What angles make a triangle?

A triangle’s angles add up to 180 degrees because one exterior angle is equal to the sum of the other two angles in the triangle. In other words, the other two angles in the triangle (the ones that add up to form the exterior angle) must combine with the third angle to make a 180 angle.

## Do triangles have equal sides?

An isosceles triangle therefore has both two equal sides and two equal angles. A triangle with all sides equal is called an equilateral triangle, and a triangle with no sides equal is called a scalene triangle.

## What is triangle Class 8?

A triangle is a polygon with three sides having three vertices. It means that the sum of the interior angles of a triangle is equal to 180°. It is a polygon having the least number of sides. In other words, a triangle is defined as a three-sided two-dimensional figure whose interior angles are equal to 180°.

## How do you name a triangle in geometry?

To name a triangle we often use its vertices (the name of the endpoints). The triangle below is named ABC. A triangle has three angles. The sum of the measures of the angles is always 180° in a triangle.

## What is triangle Class 9?

Triangle: A closed figure formed by three intersecting lines is called a triangle (‘Tri’ means ‘three’). A triangle has three sides, three angles and three vertices. e.g., In triangle ABC, denoted as ∆ABC. AB, BC, CA are the three sides, ∠A, ∠B, ∠C are the three angles and A, B, C are three vertices. 2.