Illustrations from Johannes Kepler’s book Epitome of Copernican Astronomy graphically showing the Platonic associations of the regular solids with the classical elements:
1. A dodecahedron can be constructed by adding “roofs” to the six sides of a cube (the construction which Euclid uses). 
2. Kepler constructs a rhombic dodecahedron analogously.

(Source: georgehart.com)


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