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# What is a 10-sided shape called?

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A flat 10-sided shape with sides of equal length is called a decagon. A solid 10-sided shape with faces of equal size and shape is called a decahedron.

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Two-dimensional shapes are called polygons, which means they are flat, straight-sided and closed. Three-dimensional shapes are called polyhedrons. These are solid with flat faces. Polygons and polyhedrons with all sides or faces the same size are called regular and are named from the Greek words associated with the number of sides or faces they contain. Polygons and polyhedrons are two kinds of shapes studied in the branch of mathematics known as plane geometry.

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## Related Questions

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The perimeter of a kite is the total distance around the outside of its shape, which means the length of all four of its sides added together. Since a kite has two pairs of matching sides, the standard formula is that the perimeter equals "2a" plus "2b."

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• A:

A polygon with 10 sides is called a decagon. The word comes from the Greek words for "ten" ("deka") and for "angle" or "corner" ("gonia"). Decagons have 10 angles and 10 sides.

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A 10-sided shape is known as a decagon. It is a two-dimensional polygon, which means it is a closed shape consisting of 10 straight lines. Sides may or may not be the same length.