A polygon with 20 sides is an icosagon.
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An icosagon is a two-dimensional polygon, not a three-dimensional figure. An icosagon has 20 sides - while an icosahedron has 20 faces.
A regular polygon has equal sides and angles. A polygon has a surface area but a polyhedron has many faces as for example a pyramid.
yes it is because its faces are pentagons so it is a polygon
An internal angle of the polygon.
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