The perimeter of a semicircle of radius 21 cm is ___
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108 cm is the The perimeter of a semicircle of radius 21 cm
Step-by-step explanation:
The perimeter of a semicircle of radius 21 cm
= Arc length of semicircle + Diameter
Diameter = 2 * 21 = 42 cm
Arc length of Semi circle = π R
= (22/7) * 21
= 22 * 3
= 66 cm
The perimeter of a semicircle of radius 21 cm = 42 + 66 = 108 cm
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Answer:
108 is ur answer............
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