SAT Math Multiple Choice Practice Question 106: Answer and Explanation

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Question: 106

18.

The perimeter of the right triangle pictured above is

A. 21 cm
B. 36 cm
C. 42 cm
D. 54 cm
E. 108 cm

Correct Answer: B

Explanation:

B. According to the Pythagorean Theorem, the hypotenuse equals . To find the perimeter, just add up the sides: 9 + 12 + 15 = 36. By the way, if you answered 54, you found the triangle's area, not its perimeter.

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