Results for icosahedron

Definition of icosahedron:
Usage examples for icosahedron:
In particular Plato tells us that they asserted that the four elements of the real world were the tetrahedron, octahedron, icosahedron and cube, and Plutarch ascribes this doctrine to Pythagoras himself. ” The Teaching of Geometry, - David Eugene Smith.
If you cut out a piece of cardboard of the form shown in the smaller diagram, and cut half through along the dotted lines, it will fold up and form a perfect icosahedron Amusements in Mathematics, - Henry Ernest Dudeney.

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