Question

If a, b, c are the lengths of the sides of a triangle ABC. Then tell which of the following
triangles are not right angled triangles. Any of ∠A, ∠B and ∠C may be a right angle.
(i) a = 6, b = 5, c = 7 (ii) a = 8, b = 9, c = 145
(iii) a = 12, b = 5, c = 13

Answer 1

hey mate

here is your answer

as third option satisfy Pythagoras theorem

thus by the Converse of this theorem

13²=12²+5²

option (iii) is correct.