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# How many edges does a dodecahedron have?

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A dodecahedron has 30 edges that are shared by 12 faces. A regular dodecahedron is a three-dimensional shape where all the faces are pentagons.

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There are many different types of dodecahedron, such as the rhombic or pyritohedral dodecahedron. Both of these variations lack regular pentagonal faces, which means that all of their edge lengths are not the same. Different types of dodecahedrons have different numbers of edges.

A regular dodecahedron is a highly symmetrical shape, having multiple lines of symmetry. There are other 12-sided shapes that have limited or no symmetry, usually consisting of a mixture of pentagonal, square or triangular faces.

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## Related Questions

• A:

A square pyramid, a pyramid with four triangular sides and one square side, is a figure with five faces, eight edges and five vertices. It is a kind of three-dimensional solid. The pyramids at Giza, Egypt are examples of such a figure.

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• A:

A hexagonal prism has 12 vertices, along with eight faces and 18 edges. This shape has two hexagonal sides, as well as size rectangular sides that connect the sides of the hexagons.

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• A:

A tetrahedron is a shape made out of four triangular faces, and it has a total of six edges. Although each of the four sides of a tetrahedron has three edges, the shape does not have 12 edges, as some of the edges are shared.This figure can also be referred to as a triangular pyramid.