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You will find five regular Platonic solids the brand new tetrahedron, the brand new cube, the brand new octahedron, the newest dodecahedron, and also the icosahedron. Pentagrams try aspects to the Kepler–Poinsot superstar polyhedra and you will Schläfli–Hess celebrity polychora. 5 is additionally the first away from around three understood Wilson primes (5, 13, 563). 5 ‘s the next Fermat primary, out of a total of five understood Fermat primes. (more…)