Question

Which set of measurements forms a right triangle? Use the Pythagorean theorem: a2 + b2 = c2.

A) 15, 20, 25

B) 15, 21, 26

C) 14, 20, 25

D) 14, 21, 25

Answer 1

A. 15, 20, 25.

Explanation:

25^2 = 625

20^2 = 400

15^2 = 225.

Now 625 = 400 + 225 = 625 so it is choice A.