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25-01-2020
Mathematics

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a=64πm^2 , find circumference, answer in terms of pi

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ukshedrack ukshedrack

25-01-2020

Answer:

16π

Step-by-step explanation:

Circumference = 2πr. Since the radius, r, is unknown, we can get it from the area.

Area = πr² = 64π ;

Divide both sides by π. We are left with

r² = 64; To find r, take square root of both sides

Therefore, r = √64 = 8m;

Circumference = 2×π×8 = 16πm

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