Great post. The diamond statement never made sense to me either. I had always assumed that the base of the upside down triangle was the horizontal, as that's the plane where the geometries of the base and the two points of the other triangles come together (which I assumed was what they meant by intersect). That horizontal line/plane would then be projected down on the four sides to form the point of the top of the diamond you created.
I think the diamond then is perhaps what you created, but not with as many sides. Could it be eight-sided? See attachments. The second image isn't accurate of course, as the bottom section would be shorter.
pyramid.jpg (Size: 62 KB / Downloads: 44)
octahedron.gif (Size: 1.96 KB / Downloads: 18)
I think the diamond then is perhaps what you created, but not with as many sides. Could it be eight-sided? See attachments. The second image isn't accurate of course, as the bottom section would be shorter.
pyramid.jpg (Size: 62 KB / Downloads: 44)
octahedron.gif (Size: 1.96 KB / Downloads: 18)