Rectangle

The rectangle is a semi-uniform quadrilateral with 2 pairs of opposite parallel sides. All interior angles of a rectangle measure 90°. A rectangle is the prism product of two dyads of different lengths.

Any rectangle can tile the euclidean plane, regardless of its sides.

Vertex coordinates
Coordinates for the vertices of a rectangle with side lengths a and b, centered at the origin, are:
 * (±a/2, ±b/2).

In vertex figures
Because the rectangle is a semi-uniform polygon, all polyhedra with rectangular vertex figures are quasiregular. They are also all the result of rectification of regular polyhedra.