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A, B and E are 3 circles all with radius 1 unit.
A and E touch at P while B and E touch at Q.
∠P O Q = x degrees where O is the center of E.
Find the area of the overlapping portion of A and B
if 0 ≦ x ≦ 60

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It is visited by 14,000 - 23,000 people daily, mostly from USA, Bulgaria and Russia.

In 2011 was created a Russian version, and in 2015 Serbian.

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