Question

Find the circumference of a semicircle with diameter d centimetre

Answer 1

Circumference = πr + d cm

circumference = πd/2+ d

circumference = 3πd / 2

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Answer 2

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Circumference of semicircle = 2πr

but r = d/2

then circumference = $2×π×d/2$
let circumference = πd ..... cm

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