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 MoreAn 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.
Learn more in ShapesA rectangular pyramid has five faces, which consists of one rectangular face and four triangular faces. Pyramids are named after the shape of their base, which means a rectangular pyramid has a rectangle for a base.
Full Answer >A cube has six faces, 12 edges and eight vertices. Each face of a cube is an identical square, and every edge has an identical length, which is equal to the length of the sides of the faces.
Full Answer >A sphere has no faces, edges or vertices. By definition, it is a curved three-dimensional geometric figure whose surface is defined as the set of all the points equidistant from its center point.
Full Answer >A square is a two-dimensional shape that does not have a face, but a square is one of the faces of a cube. Faces are associated with solid figures, such as cylinders, cubes and pyramids. Two-dimensional shapes have breadth and width, but they do not have thickness.
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