If a circle has diameter 10 cm, what is its circumference? Use pi = 3.14.

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Multiple Choice

If a circle has diameter 10 cm, what is its circumference? Use pi = 3.14.

Circumference is found by multiplying the diameter by pi. With a diameter of 10 cm and pi approximated as 3.14, the circumference is 3.14 × 10 = 31.4 cm. You can also get the same result using the radius: r = 5 cm, and C = 2πr = 2 × 3.14 × 5 = 31.4 cm. The other numbers would come from using different pi values or a different formula, but with pi = 3.14 this is the correct result.

Circumference is found by multiplying the diameter by pi. With a diameter of 10 cm and pi approximated as 3.14, the circumference is 3.14 × 10 = 31.4 cm. You can also get the same result using the radius: r = 5 cm, and C = 2πr = 2 × 3.14 × 5 = 31.4 cm. The other numbers would come from using different pi values or a different formula, but with pi = 3.14 this is the correct result.

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