What is the perimeter of a semi circle of radius 2r?
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Answer:
10.28
Step-by-step explanation:
perimeter of a semicircle = (22/7 + 2)r
= (22/7 + 2) 2
= (22+14/7) 2
= (36/7) 2
= 36x2/ 7= 72/7 = 10.28
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