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The Icosahedron

The icosahedron is one of the five Platonic solids.

icosahedron icosahedron skeleton

20 faces: equilateral triangles

12 vertices

30 edges

Dihedral angles:  138 degrees, 11 minutes
 

The 5 Platonic Solids: 1 - 2 - 3 - 4 - 5
The 13 Semi-Regular Platonic Solids: 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13
More With Platonic Solids: 1 - 2 - 3 - 4

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