A pyramid
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A Platonic solid is a solid all of whose face are regular and congruent polygons.There are five of these:A Tetrahedron. Four faces, each an equilateral triangle.Ad InfoA Hexahedron (Cube). Six faces, each a square.An Octahedron. Eight faces, each an equilateral triangle.A Dodecahedron. Twelve faces, each a regular pentagon.An Icosahedron. Twenty faces, each an equilateral triangle.
A pentagonal prism
tetrahedron
one face eight edges and five corners * * * * * The above answer is complete rubbish. A pyramid is a generic term for three dimensional shapes which consist of an n-sided polygon (n > 2) as base and n triangular faces meeting at an apex above the base. For any integer n>2, a pryramid with an n-polygonal base has: n + 1 faces n + 1 vertices and 2n edges.
Triangular prism