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 ...

Sacred geometry appears all throughout nature. The arrangement of leaves on a stem, the spiral patterns of pinecones, the ...

So only three Platonic solids can be made from triangles. Image caption, Three squares make the corner of a cube. However four squares just make a flat sheet that can’t be folded into a corner.

There are five platonic solids, the tetrahedron, cube, octahedron, dodecahedron and icosahedron. A prism is a 3D shape with a constant polygon shaped cross-section. A prism is named by the shape ...