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Polyhedra

Triangular Prism - a solid shape with two equal triangular faces on opposite ends oriented in the same direction and parallel. Three parallelograms connect the matching triangular edges. If the parallelograms are rectangles, it is called a right prism. Otherwise it is called an oblique prism.

Rectangular Prism - a rectangular prism is a solid shape with six rectangular faces. Opposite faces have the same shape, size, and orientation and are parallel.

Cube - a regular rectangular prism; all faces are squares of equal size. It has six faces, eight vertices, 12 edges, and is one of the five Platonic solids.

Parallelepiped - a generalization of a rectangular prism in which all the faces are parallelograms, but not necessarily rectangles. A parallelepiped has six faces that come in parallel pairs.

Pentagonal Prism - a pentagonal prism has two equal pentagonal faces on opposite ends oriented in the same direction and parallel to one another. Five parallelogram faces connect the matching pentagonal edges.

Hexagonal Prism - a solid shape with two equal hexagonal faces on opposite ends oriented in the same direction and parallel. Six parallelogram faces connect the matching hexagonal edges.

Tetrahedron - also called a triangular prism, this shape has four triangular faces, four vertices, and six edges. If the triangles are equilateral, it is a Platonic solid,

Square Pyramid - a pyramid with a square base and four triangular faces that meet at a point opposite to the square base.

Pentagonal Pyramid - a pyramid with a pentagonal base and five triangular faces that meet at a point opposite to the base.

Hexagonal Pyramid - a pyramid with a hexagonal base and six triangular faces that meet at a point opposite to the base.

Octahedron - a solid shape with eight triangular faces, six vertices and 12 edges. Each vertex is the meeting point of four triangles. If the triangles are equilateral, it is one of the Platonic solids

Dodecahedron - any solid shape with 12 faces. A pentagonal dodecahedron is a Platonic solid with 12 regular pentagonal faces, 20 vertices and 30 edges, where each vertex is the meeting point of three pentagons. Not all dodecahedrons have pentagonal faces, for example, a rhombic dodecahedron’s 12 faces are rhombuses.

Icosahedron - a solid shape with 20 triangular faces, 12 vertices and 30 edges. Each vertex is the meeting point of five triangles. If the triangles are equilateral, it is one of the Platonic solids.

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