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Pentacontagon

In geometry, pentacontagon is a polygon with 50 sides. The measure of each angle of a regular pentacontagon is 172.8°, and the area with side length a is given by

A = \frac{25}{2}a^2 \cot \frac{\pi}{50} \simeq 198.682 a^2.
01-04-2007 01:16:19
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