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.

Know More

## 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 hexagonal prism has eight faces, six of which are rectangles, and two of which are hexagons. A hexagonal prism consists of a top and bottom hexagon that are both joined by straight lines connecting each set of vertices.

Filed Under:
• A:

A cone has one face, one edge and no corners. A cone is defined as a hollow or solid object with a circular base that tapers upward to a point.

Filed Under:
• A:

A rectangular prism has six faces. Unlike many other prisms, the faces on a rectangular prism are all rectangles. For instance, a trapezoidal prism has two faces that are trapezoids while the other faces are rectangles.