Question

The lengths of the sides of some triangles are given below. Find out which of them are right-angled triangles.

(1) 1.5 m, 2 m, 2.5 m

Answer 1

The lengths of the sides of the triangle are 1.5 m, 2 m and 2.5 m.
Longest side = 2.5 m
Square of longest side = (2.5)² = 6.25
Side one= 1.5 m
Square of side one = (1.5)² = 2.25
Side two = 2 m
Square of side two = (2)² = 4
Sum of square of side one and square of side two = 2.25 + 4 = 6.25
= Square of longest side
Hence, this is a right-angled triangle.