Partial Construction of an Icosahedron Small 279×320 Medium 558×640 Large 892×1024 Download Tiff Original 2091×2400 | (385.0 KB) Description Illustration of the steps to a construction of an icosahedron. The base consists of a regular pyramid, upon which equilateral triangles are inserted to form the next section of the icosahedron, followed by another pyramid. Keywords equilateral triangles, icosahedron, icosahedrons, pentagon, pentagonal pyramid, Polyhedron, polyhedrons, pyramids, solid, solids Galleries Miscellaneous Solid Forms Source: Arthur Latham Baker The Elements of Solid Geometr with Numerous Exercises (Boston, MA: Ginn & Company, 1893)
