6 terms

Triangles ALWAYS have 3 sides. The interior angles of a triangle add up to 180 degrees.
Here are the triangles you are expected to know about:
1. Equilateral Triangle
2. Isosceles Triangle
3. Right- Angled Triangle
4. Scalene Triangle

Equilateral Triangle

a triangle with three equal sides

Isosceles Triangle

a triangle with two equal sides

Obtuse Triangle

Has an angle more than 90°

Right Triangle

Has a right angle (90°)

Acute Triangle

All angles are less than 90°

Scalene Triangle

a triangle with no two sides of equal length