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

User Vineet Goel
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1 Answer

14 votes
14 votes
P= 2r + 1/2 pi r
P= 2 x 90 + 1/2 pi 90
P= 180 + 45 pi. Or 321.371 cm
User Jasminka
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