A Platonic solid.A Platonic solid.A Platonic solid.A Platonic solid.
There are five Platonic solids: Tetrahedron (or triangular pyramid): 4 triangular faces Cube: 6 square faces Octahedron: 8 triangular faces Dodecahedron: 12 pentagonal faces Icosahedron: 20 triangular faces. Although not a Platonic solid, some people consider a sphere to be a regular 3d shape.
No. All the faces of a Platonic solid are identical regular polygons.
Platonic solids are regular polyhedra whose faces are all regular polygons, such that the same number of faces meet at each vertex.The five Platonic solids areTetrahedron - 4 triangular faces;Cube - 6 square faces;Octahedron - 8 triangular faces;Dodecahedron - 12 pentagonal faces;Icosahedron - 20 triangular faces.
The faces of Platonic solids are regular polygons...
Because a tetrahedron is a triangular based pyramid that has 4 identical faces and 4 faces meet at all the vertices.
There are 5. They are the tetrahedron (4 triangular faces), the cube (6 square faces), the octahedron (8 triangular faces), the dodecahedron (12 pentagonal faces), and the icosahedron (20 triangular faces).
No, because the base of the triangle can be basically any polygon, and only a triangle with an equilateral triangle is a platonic solid. To be more specific, only a regular tetrahedron, in which all 4 triangular faces are equilateral, is a platonic solid. Any triangular pyramid is a tetrahedron, but not necessarily a regular tetrahedron. The pyramids in Egypt and Central America are square pyramids, by the way, not triangular.
A rectangular pyramid has five faces. Sides are the same things as faces. A pyramid with a triangular base has 4 faces. This is the more common type of pyramid in mathematics, as it is a platonic solid.
A triangular prism.