Question 818620: Find the diameter of the circle that has a circumference equal to its area.
2
4
8
10
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! c = 2 pi r
a = pi r r
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2 pi r = pi r r
(2 pi r)/(pi r) = (pi r r)/(pi r)
2 = r
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diameter = 2r = 4 (circumference units, for example foot, meter, etc.)
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