# What are the types of triangle?

## Triangles

There are 4 types of triangle. They all have 3 sides and are polygons.

### 1. Equilateral

Equilateral triangles have 3 equal sides and 3 equal angles of 60°

### 2. Isosceles

Isosceles triangles have 2 equal sides and 2 equal angles.

### 3. Right-angled

1 of the angles is a right angle (90°) in right-angled triangles.

### 4. Scalene

Scalene triangles have no equal sides and no equal angles.