Digital PSAT Math Practice Question 177: Answer and Explanation

Question: 177

If a circle has a diameter of 8 centimeters, what is its circumference rounded to the nearest whole centimeter?

Correct Answer: 25

Explanation:

(25) Use the circumference formula, 2πr, to solve for the circumference. Since the diameter is 8 centimeters, the radius will be half of this: 4 centimeters. Plug 4 into the circumference formula to solve for the circumference:

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Round it to the nearest whole centimeter to get 25.

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