Text-book of Euclid's elements for the use of schools : books I - VI and XI (1900)
Hall, H. S. (Henry Sinclair), 1848-1934, Stevens, F. H. (Frederick Haller), 1853-1933 · MacMillan : London · leaf 437
that there canonly he five regular polyhedra.They are defined as follows :— (i) A regular tetrahedron isa solid figure bounded by fourplane faces, which are equal and•equilateral triangles. (ii) A cube is a solid figurebounded by six plane faces, whichare equal squares. (iii) A regular octahedron… … DEFINITIONS. 417 (v) A regular icosahedron isa solid figure bounded by twenty plane faces, which are equal andequilateral triangles.
Geometry · Mathematics
Internet Archive · UBC Library · Public Domain Mark 1.0. Free to use for anything.
