Excerpts from Fred J Poutre's message of Wed Sep 03 11:07:01 -0400 2008: > I think that was a tetrahedron, not a pyramid. > You can only see on side, with out seeing any of the connecting sides. > Because all sides are acute angles on a tetrahedron, when looking > directly at a single face, you can not see the other faces. > Pyramids with their 90 degree interface on the base, are at a 90 degree > on the sides. Meaning that you can normally see at least one of the > connecting sides, when looking directly at a single face. > Hard to tell though. Actually, I see a second face to the (viewer's) left of the easy-to-see one. You can mostly identify it by the reflected finger. The angle of those two faces is unclear to me. *However*, I think I also made out the base of the pyramid, and it did look triangular rather than square to me. I currently tentatively agree with your conclusion that this is not quite a Martian pyramid, although it bears a definite resemblance in the ratio of base to height.
Description: PGP signature