Polygons: How Many Sides?
Updated June 26, 2019 | Infoplease Staff
A geometrical figure with three or more sides is called a polygon or a polyhedron. Here are the names for some polygons.
How Many Angles?
A polygon has as many angles as it has sides. For example, a triangle has 3 sides and 3 angles. A pentagon has 5 sides and 5 angles. An octadecagon has 18 sides and 18 angles!
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