Question

(2) The lengths of all three sides of certain triangles are given. Find out which of them are right-angled triangles.

(i) 1.4, 4.8, 5

Answer 1

1.4 , 4.8 , 5
Longest side = 5
Square of longest side = (5)² = 25
First side = 1.4
Square of first side = (1.4)² = 1.96
Second side = 4.8
Square of second side = (4.8)² = 23.04

Sum of square of first side and square of second side = 1.96 + 23.04 = 25
= Square of longest side
Hence, this is a right-angled triangle.