| 11. | Including an icosahedron or whatever does not make you a mathematical artist.
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| 12. | Icosahedrons cannot be packed together to fill a solid space leaving no gaps.
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| 13. | However, neither the regular icosahedron nor the regular dodecahedron are amongst them.
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| 14. | There are 60 copies of each of these proteins assembled as an icosahedron.
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| 15. | The existence of the icosahedron amounts to the existence of six equiangular lines in.
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| 16. | Truncating edges down to points produces the great icosidodecahedron as a rectified great icosahedron.
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| 17. | The "'compound polyhedron is also a stellation of the regular icosahedron.
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| 18. | Each icosahedron is surrounded by 20 truncated tetrahedra.
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| 19. | Apical spikes extending about 20 nanometers ( nm ) protrude from the icosahedrons vertices.
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| 20. | Now think about an icosahedron, that's much more like a ball.
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