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A regular icosahedron has 20 faces (equilateral triangles), 30 edges and 12 vertices.
An icosahedron is in fact not a polygon at all, but a polyhedron. As a polyhedron it is regular however. The regular icosahedron is one of only five possible regular polyhedra. It has 20 faces, each of which is an equilateral triangle.
Icosahedron are a shape with 20 faces, 30 edges and 12 vertices. All the faces are triangles.
5 tetrahedron, cube, octahedron, dodecahedron, and Icosahedron
In geometry, an icosahedron is a regular polyhedron with 20 identical equilateral triangular faces.