A regular icosahedron is a regular polyhedron composed of 20 equally sized equilateral triangles.

Unfold of a Regular Icosahedron

Characteristics of an Icosahedron

Number of faces: 20.

Number of vertices: 12.

Number of edges: 30.

Number of concurrent edges at a vertex: 5.

Surface Area of a Regular Icosahedron

Volume of a Regular Icosahedron


Calculate the surface area and volume of a regular icosahedron with an edge of 5 cm.

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