22 edges.
That is the correct spelling of "dodecahedron" (12-sided geometric solid).
dodecahedron
The solid with 12 equal faces is a dodecahedron. A dodecahedron has 12 equal pentagon surfaces.
A dodecahedron pyramid does not exist.However, a dodecagon pyramid exists. If a dodecagon has 12 sides, there would be 12 vertices. But all the vertices would join up to make a vertex, making one extra vertex. 12 + 1 = 13
The solid commonly called a dodecahedron is not a solid pyramid but the name simply means a solid shape with 12 faces and so, a pyramid on a 11-sided polygonal base will be a dodecahedron.
The platonic solids are: a tetrahedron, a cube, an octahedron, dodecahedron and icosahedron. A pyramid has a base with triangles attached to it with a common vertex. The platonic solid that is a pyramid is a tetrahedron (a triangular based pyramid).
22 edges.
I believe it to be a dodecahedron I believe it to be a dodecahedron +++ You believe correctly: it is a dodecahedron.
That is the correct spelling of "dodecahedron" (12-sided geometric solid).
dodecahedron
The solid with 12 equal faces is a dodecahedron. A dodecahedron has 12 equal pentagon surfaces.
Dodecahedron
dodecahedron
A dodecahedron pyramid does not exist.However, a dodecagon pyramid exists. If a dodecagon has 12 sides, there would be 12 vertices. But all the vertices would join up to make a vertex, making one extra vertex. 12 + 1 = 13
Assuming that dodecherdon is your attempt at spelling dodecahedron, a dodecahedron is a solid figure with 12 flat faces.
a dodecahedron is a regular geometric solid, it has 12 pentagons as faces, 30 vertices and 30 edges