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What is the perimeter of a semicircle with a diameter of 90cm
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What is the perimeter of a semicircle with a diameter of 90cm

User Rose Perrone
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P= 2r + 1/2 pi r
P= 2 x 90 + 1/2 pi 90
P= 180 + 45 pi. Or 321.371 cm
User Marik Sh
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