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one face of this polyhedron is a pentagon. the polyhedron has a total of six vertices pentagonal pyramid a rectangular prism has dimensions 10 cm by 12 cm by 6 cm. what is the sum of the lengths of the edges
An Icosahedron is a polyhedron with 20 faces which are all equilateral triangles. It has 20 faces, 30 edges and 12 vertices. The surface area of an icosahedron is given by , where a is the edge length of the icosahedron. The volume of an icosahedron is given by , where a is the edge length of the icosahedron.