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Circular Fun (Posted on 2005-07-28) Difficulty: 2 of 5
When you draw three circles of radius r such that all three are externally tangent, what is the area of the shape in the center in terms of r?

See The Solution Submitted by Justin    
Rating: 3.2857 (7 votes)

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i think | Comment 12 of 18 |
            __
(1.7320508)*r*r - (pi*r*r)/2

your taking half of a circle, with radius r, out of an equalateral triangle with sides of length 2*r


  Posted by jamie on 2005-10-19 22:34:37
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