bn237894 bn237894

31-03-2021
Mathematics

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

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nefelintaflos nefelintaflos

31-03-2021

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

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