The Regular Polyhedra
There are five convex regular polyhedra, known as the Platonic solids, and four regular star polyhedra, the Kepler-Poinsot polyhedra:
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Famous quotes containing the word regular:
“The solid and well-defined fir-tops, like sharp and regular spearheads, black against the sky, gave a peculiar, dark, and sombre look to the forest.”
—Henry David Thoreau (1817–1862)