Question

Work out the perimeter of a semicircle with radius3 cm give your answer in terms of pie

Answer 1

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So in this case that is 3π cm as the circumference is 2πr where r is the radius. The length of the straight part is just the diameter of the circle or 2 x radius which is 6 cm in this case. So the total perimeter of the semicircle is 3π+6 cms.

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