Question

There are three types of triangles on the basis of angles and three types on the basis of sides. How many different types of triangles can be formed by combining the above two facts?

Answer 1

Acute, Obtuse and right angled triangle are the three triangles on the basis of angles.

Equilateral, Isosceles and Scalene are three triangles on the basis of of sides.

The seven types of triangles that exist in the world: equilateral, right isosceles, obtuse isosceles, acute isosceles, right scalene, obtuse scalene, and acute scalene.