Euclid Book 13
Book 13 concerns the tetrahedron, cube, octahedron, icosahedron and dodecahedron. These figures likely come from either Pythagorus or Theaetetus and were studied more by the school of Euclid, but Plato discussed them in a dialog with Timaeus. Even though Plato merely promoted these figures, they are now called the Platonic solids, an early example of Stigler’s law of eponymy that things are named after the wrong person.
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Euclid Book 13 Proposition 1
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Euclid Book 13 Proposition 2
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Euclid Book 13 Proposition 3
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Euclid Book 13 Proposition 4
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Euclid Book 13 Proposition 5
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Euclid Book 13 Proposition 7a
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Euclid Book 13 Proposition 7b
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Euclid Book 13 Proposition 8
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Euclid Book 13 Proposition 9
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Euclid Book 13 Proposition 10
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Euclid Book 13 Proposition 12
