Question

how to find the area and the perimeter of a semicircle when the diameter is 20 cm

Answer 1

Answer:

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Perimeter of a circle = 2πr diameter , d = 20 cm. Perimeter of a semi circle = 1/2 π × d + d. = 1/2 × 3.14 × 20 +20 ( π = 3.14 ) = 51 . 4 m. 4.3.

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Answer 2

Answer:

$perimeter of semicircle= semicircle of semicircle+ diameter$

=πr+d. =22/7×10+20. =51.4285714857