This document defines and describes the four types of triangles: equilateral triangles have three equal sides and three equal interior angles; isosceles triangles have two equal sides and two equal interior angles; scalene triangles have no equal sides and all different interior angles; right-angled triangles contain one 90 degree interior angle and can be either isosceles or scalene.
5. Right-Angled Triangles
They have an Interior angle of 90 degrees
Right-Angled Triangles can be either Isosceles or scalene
triangles
Scalene Right Angled Triangle Isosceles Right Angled Triangle
6. Right-Angled Triangles
They have an Interior angle of 90 degrees
Right-Angled Triangles can be either Isosceles or scalene
triangles
Scalene Right Angled Triangle Isosceles Right Angled Triangle