Four people dressed as detectives walk past with magnifying glasses. NARRATOR: This song is all about shapes. Not flat shapes like circles and squares, but solid shapes like cubes and cones. Let ...

A 13-sided tile called “the hat” forms a pattern that covers an infinite plane yet it cannot repeat, making it a long-sought shape known as an “einstein.” A sample of that pattern is shown ...

Platonic solids, the first class of such shapes, are well known. They consist of five different shapes: tetrahedron, cube, octahedron, dodecahedron and icosahedron.

Platonic solids, the first class of such shapes, are well known. They consist of five different shapes: tetrahedron, cube, octahedron, dodecahedron and icosahedron.