
Polygon with twenty sides and twenty vertices.
The sum of the internal angles of a icosagon is .
The area of a regular icosagon is given by the formula:
where is the length of the side of the regular icosagon.


Polygon with twenty sides and twenty vertices.
The sum of the internal angles of a icosagon is .
The area of a regular icosagon is given by the formula:
where is the length of the side of the regular icosagon.
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