Question

3. Which of the following cannot form a right angled triangle?

(a) 5,12,13 (b) 7,24,25

(c) 9,40,42 (d) 11,60,61​

Answer 1

Step-by-step explanation:

sorry friend this answer I don't no

Answer 2

Answer is c) 9,40,42

Step-by-step explanation:

You just need to apply Pythagoras theorem and see if they are Pythagorean triplets or not

5^2 = 25

12^2 = 144

5^2 + 12^2 = 169 - (1)

13^2 = 169 - (2)

(1) = (2) ... therefore it is a Pythagorean triplet

similarly you can do it for every question and you will see that in c, 9's square and 40's square is not equal to 42's square