Question

Find the length of the hypotenuse of a right triangle if a = 9 and b = 12. A) 10.5 B) 15 C) 16.5 D) 21

Answer 1

a^2 + b^2 = c^2


With this, we can tell that

9*9 + 12*12 = X^2


81 +144 = X^2

225 = X^2

(take the square root of 225)

15 = X

therefore, option B is your answer :)

Answer 2

the answer is 15 because hypotenuse equals a^2 + B^2 = √answer