A dodecahedron is a polyhedron with 12 faces. There are 6,384,634 topologically distinct convex dodecahedra with 8 or more vertices. A hexagonal bipyramid, a dodecadeltahedron, a triakis tetrahedron are examples of dodecahedra all of whose faces are triangles. There are many more dodecahedra in which some, but not all, faces are triangles.
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The Platonic solids in modern Euclidean geometry are five regular polyhedra. These are three-dimensional objects that are bounded by regular polygonal faces. They are: Tetrahedron (or triangular pyramid): 4 triangular faces; Hexahedron (cube): 6 square faces; Octahedron: 8 triangular faces; Dodecahedron: 12 pentagonal faces; Icosahedron: 20 triangular faces. See link for more.
A dodecahedron is a polyhedron with 12 faces, each of which is a regular pentagon. In a dodecahedron, the faces are not parallel to each other. The planes of the faces intersect at various angles, giving the dodecahedron its unique shape and properties.
Every dodecahedron - not just an average one, has 12 faces. It can have as few as 8 vertices.
When you say "sides", do you mean faces or edges? A dodecahedron has 12 faces and 30 edges.
Some polyhedra with 24 faces include:A triaugmented dodecahedron, which consists of 15 triangular faces and 9 pentagonal faces.A disphenocingulum, which consists of 20 triangular faces and 4 quadrilateral faces.A triakis octahedron, which consists of 24 triangular faces.A tetrakis hexahedron, otherwise known as a disdyakis cube, which consists of 24 triangular faces - the appearance of a cube on the inside, with six pyramidal faces on each cubic face.A trapezoidal icositetrahedron, which consists of 24 quadrilateral faces.And a pentagonal icositetrahedron, which consists of 24 pentagonal faces.