Question

what is perimeter of a semi circle...​

Answer 1

Answer:

The perimeter of a semicircle is the sum of the half of the circumference of the circle and diameter. As the perimeter of a circle is 2πr or πd. So, the perimeter of a semicircle is 1/2 (πd) + d or πr + 2r, where r is the radius.

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Explanation:

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Answer 2

Answer:

The perimeter of a circle is "2*pi*r"

So the perimeter of the semi-circle will be [2'pi'r/2]

But you need to add the diameter in [2'pi'r/2] Because semi-circle contains the diameter as a boundary.

So the perimeter of the semicircle is [2'pi'r/2] + 2r

Hope this helps!!!!