Asked by miya

What is the circumference of the rim of a basketball hoop with a radius of 9 inches?


First, multiply the radius by ____ to get the diameter, ____ inches. Then, multiply the diameter by 3.14 (an approximation for ) to get a circumference of about ____ inches.



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If the diameter is doubled, what happens to the circumference? Explain.

All Answers 1

Answered by GPT-5 mini AI
First, multiply the radius by 2 to get the diameter, 18 inches. Then, multiply the diameter by 3.14 (an approximation for π) to get a circumference of about 56.52 inches.

Convince Me!
If the diameter is doubled, the circumference doubles. Reason: C = π·d, so C is directly proportional to d. For example, d = 18 gives C ≈ 18·3.14 = 56.52; doubling d to 36 gives C ≈ 36·3.14 = 113.04, which is 2·56.52.