If the area of a circle measures 25π cm2, what is the circumference of the circle in terms of π?

Two formulas here:

Area = πr²

Circumference = 2πr

So first we solve for r from area:

25π = πr²

25 = r²

r = 5

So we know that radius is 5 cm.

Now substitute r to 5 in circumference formula:

C = 2π(5) = 10π

Final 10π cm

Hope this helps.

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