# What are Triangles

A triangle is a three sided polygon with three sides and three angles

3 Different triangles can be described below

**Isosceles triangle** has two equal sides.

**Scalene triangle **has no equal sides.

**Equilateral triangle** has three equal sides

Types of Triangle according to its Angles

**Right triangles** are triangles in which the measure of one angle equals 90 degrees

**Obtuse triangles** are triangles in which the measure of one angle is greater than 90 degrees

**Acute triangles** are triangles in which the measures of all three angles are less than 90 degrees.

Triangles can also be named using angles and sides at the same time.

**Right Isosceles Triangle** is a triangle that has one right angle and two equal sides.

**Acute Scalene Triangle** is a triangle that has only acute angles and no equal sides.

**Obtuse Isosceles Triangle** is a triangle that has two equal sides and one obtuse angle.