23 Sep
2016
23 Sep
'16
2:52 p.m.
"The volume of a regular tetrahedron (triangular pyramid with unit edges) is exactly half the volume of a square pyramid with unit edges." True or false? --rwg
Trick puzzle: prove that the volume of _every_ such pyramid (unit edges, regular polygon base) is a quadratic surd. -- Don Reble djr@nk.ca