Types of triangles are defined based on similarity of their sides and angles.

## Types based on Sides

## Equilateral Triangle

Equilateral triangle has all the three sides with equal length.

Each angle is 60°.

## Isosceles Triangle

Isosceles triangle has two sides with equal length.

Angles opposite to the equal sides are also same.

## Scalene Triangle

Scalene triangle has all sides with unequal length.

Angles of scalene triangle are also different.

## Types based on Angle

## Right Angle Triangle

Right angle triangle has one angle of 90°.

Side opposite to right angle is known as hypotenuse.

## Acute Triangle

Acute triangle has all the angles measuring less than 90°.

## Obtuse Triangle

Obtuse triangle has one angle measuring greater than 90°.