If a circle has radius 7 cm, what is its circumference? Use pi = 3.14.

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Multiple Choice

If a circle has radius 7 cm, what is its circumference? Use pi = 3.14.

Use the circumference formula C = 2πr. With a radius of 7 cm, C = 2 × π × 7 = 14π. Substituting π = 3.14 gives C = 14 × 3.14 = 43.96 cm. So the circumference is 43.96 cm. The nearby 44 cm comes from rounding, but the precise value with the given pi is 43.96 cm. Other options deviate because they rely on rounding or a different approximation.

Use the circumference formula C = 2πr. With a radius of 7 cm, C = 2 × π × 7 = 14π. Substituting π = 3.14 gives C = 14 × 3.14 = 43.96 cm. So the circumference is 43.96 cm. The nearby 44 cm comes from rounding, but the precise value with the given pi is 43.96 cm. Other options deviate because they rely on rounding or a different approximation.

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