Q:

# How many faces does an icosahedron have?

A:

An icosahedron is a regular polyhedron with 20 faces, all of which are equilateral triangles. An icosahedron has 30 edges and 12 vertices. Five equilateral triangles meet at each vertex.

## Keep Learning

Credit: fdecomite CC-BY 2.0

An icosahedron is an example of a Platonic solid, which is a polyhedron that is regular, convex, made of congruent faces of regular polygons, and has the same number of faces meeting at each vertex. Only five known shapes meet this criteria.

The other Platonic solids include the tetrahedron with four triangular faces, the cube, or hexahedron, with six square faces, the octahedron with eight triangular faces and the dodecahedron with twelve pentagonal faces.

Sources:

## Related Questions

• A: A vertex is a corner on a polygon, polytope or polyhedron, and when faces, facets or edges of an object come together, a vertex forms; however, because a s... Full Answer >
Filed Under:
• A: A pyramid refers to a polyhedron created by joining a polygonal base to triangular lateral faces. There are several types of pyramids, and each is named af... Full Answer >
Filed Under:
• A: A rectangular pyramid is a pyramid that has a rectangle as the base and the rest of the faces are composed of triangles. A pyramid is named based on the sh... Full Answer >
Filed Under:
• A: The faces of a triangular prism are parallelograms while the two bases are triangles. This gives the prism three faces. In a regular prism, the faces are r... Full Answer >
Filed Under:
PEOPLE SEARCH FOR