Question

Circumference C of semi-circle= (1/2 *pi*d) + d
(required proof of this formula..??))
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Answer 1

Answer:

The formula for the circumference of a semicircle is, C = (πr + 2r), where 'r' is the radius. As we know that diameter is twice the value of the radius, thus, d = 2r. The formula for the circumference of a semicircle becomes, C = π(d/2) + d.

Answer 2

Answer:

Refer to the attachment