Practical plane and solid geometry for advanced students, including graphic statics, adapted to the requirements of the South Kensington syllabus (1899)
Harrison, Joseph, Baxandall, George Albert · London Macmillan · leaf 476
^r + ] ix … CHAPTER XIX MISCELLANEOUS PROBLEMS 359. The five regular polyhedra.— It is shown intreatises on pure solid geometry that there are five, andonly five regular polyhedra. These are the tetrahedron,cube, octahedron, dodecahedron, and icosahedron; see theAppendix, Definitions 18 to 22. We have already…