Circle Warmup

Geometry Level 1

Find the circumference of the circle if half the radius of the circle is 3.14 cm 3.14\text{ cm} . Leave your answer in terms of π \pi .

12.56 π cm 12.56\pi\text{ cm} 21.56 cm 21.56\text{ cm} 12.56 cm 12.56\text{ cm} 21.56 π cm 21.56\pi\text{ cm}

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Hopfhen Shane by Hopfhen Shane , 31, Singapore

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1 solution

Sam Bealing
May 15, 2016

r = 2 × 3.14 = 6.28 r=2 \times 3.14=6.28

C i r c u m f e r e n c e = 2 × π × 6.28 = 12.56 π Circumference=2 \times \pi \times 6.28=\boxed{12.56 \pi}

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