A polygon with 27 sides is called a heptacosagon. The name is derived from the Greek words "hepta" meaning seven and "cosi" meaning twenty. The heptacosagon has 27 vertices and 27 angles, with the sum of its interior angles equal to 4050 degrees.
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A polygon with 12 sides is called a dodecagon.
an Irregular Polygon
No more than 27.
A polygon.
A polygon with 11 sides is called an "undecagon."