Explanation:
5cm, 9cm, 11cm
Any triangle is right angled if it satisfies a\(^{1}\)+ b\(^{1}\) = c\(^{1}\), where c is the largest side from option
(A) we take a = 12cmb = 5cmc = 13cm
we know (12)\(^{1}\) + (5)\(^{1}\) = 169 = (13)\(^{1}\) so we can construct a right angled triangle. Similarly in option
(B) we can take a = 8cmb = 6cmc = 10cm with these sides also we can construct a right angled triangle.Consider option
(C) then a = 5cmb = 9cmc = 11cm a\(^{1}\)+ b\(^{1}\) = 25 + 81 But c\(^{1}\) = 121 = 106
So we cannot construct right angled triangle from 5cm, 9cm, 11cm