Question

Which set of three number could represent the lengths of the sides of a right triangle? 7,9,11 8,15,17 12,18,22

Answer 1

8,15,17 represents

(17)^2=289

(15)^2=225

(8)^2=64

i.e. (17)^2=(15)^2+(8)^2

By converse of Pythagoras theorem

This ∆ is a right angled ∆