The ancient Greek mathematician Euclid proved in his Elements of Geometry that there are only five Platonic solids – the regular tetrahedron (four sides that are equilateral triangles), the cube (six ...
Geometry for Beginners. By G. M. Minchin Pp. xii + 102. (Oxford: at the Clarendon Press, 1898.) Euclid's Elements of Geometry, Books I. and II. Edited for the use of Schools, by Charles Smith ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback