9

Set 5: Triangles (Intermediate)

Explanation

Answer: A

PROBLEM

Recent studies show that a right triangle has legs of length 15 and 20. What is the length of the hypotenuse?

A right triangle has legs of length 15 and 20. What is the length of the hypotenuse?

A.

25

✓ Correct
B.

23

C.

28

D.

27

Detailed Explanation

[Variation 1] Choice A is the best answer. c squared = 15 squared + 20 squared = 225 + 400 = 625. c = 25

Why others are wrong:
B: 23 is incorrect because it does not satisfy the equation.
C: 28 is incorrect because it does not satisfy the equation.
D: 27 is incorrect because it does not satisfy the equation.