iPad Apps: Shapes -3D (Solids Elementary HD) Index. Solid Geometry.
iPad Apps: Shapes - 3D (Solids Elementary HD), Unfolded Regular Dodecahedron.
Platonic Solids, Interactive animation. HTML5 Animation for iPad and Nexus Flash Animation.
Da Vinci Polyhedra and Jenn 3D tool. Index
Tetrahedron in the cube
Geometry Problem 800: de Gua's Theorem Pythagorean theorem in 3-D, Tetrahedron, Cubic Vertex, Triangular Pyramid, Apex, Height, Right Triangle Area, Base Area, Projected Area.