Question

formula circumference of semicircle

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Answer 1

Answer:

Perimeter of a Semicircle

The formula for a circle's circumference, C, is C = 2 * pi * r, where r is, again, the circle's radius. A semicircle is half a circle, however, so we'll need to divide the formula for perimeter by two just like we did the formula for area. The perimeter P = pi * r.

Step-by-step explanation:

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Answer 2

Answer:

πr

Step-by-step explanation:

1/2×circumference

1/2×2πr

πr