 An irregular Heptacontakaiheptagon. In geometry, a Heptacontakaiheptagon is a polygon with 77 sides and angles.
The measure of each internal angle of a regular heptacontakaiheptagon is approximately 175.325 degrees, and the area with side length a is given by
- <math>A = \frac{77}{4}a^2 \cot \frac{\pi}{77} \simeq 471.553 a^2.<math>
See also
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