What is the circumference of a circle with a diameter of 7 inches? Use 3.14 for pi and round to the nearest whole number.

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Multiple Choice

What is the circumference of a circle with a diameter of 7 inches? Use 3.14 for pi and round to the nearest whole number.

Explanation:
The main idea is that the circumference of a circle is found using the formula C = πd, where d is the diameter. With a diameter of 7 inches, C = 3.14 × 7 = 21.98. Rounding to the nearest whole number gives 22 inches. So the circumference is about 22 inches. If you check with the radius form, C = 2πr and r = 3.5 inches, you get the same result: 2 × 3.14 × 3.5 = 21.98, rounding to 22. The other numbers don’t come from this calculation, so they don’t match the rounded circumference.

The main idea is that the circumference of a circle is found using the formula C = πd, where d is the diameter. With a diameter of 7 inches, C = 3.14 × 7 = 21.98. Rounding to the nearest whole number gives 22 inches. So the circumference is about 22 inches. If you check with the radius form, C = 2πr and r = 3.5 inches, you get the same result: 2 × 3.14 × 3.5 = 21.98, rounding to 22. The other numbers don’t come from this calculation, so they don’t match the rounded circumference.

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