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