A 26-sided shape is called a rhombicuboctahedron. It is known by other names such as snub square antiprism, elongated square gyrobicupola, and 26-agon.

A 26-sided shape is called a rhombicuboctahedron. It is known by other names such as snub square antiprism, elongated square gyrobicupola, and 26-agon.

There are several names for a 26 sided shape, they are: Elongated Square Gyrobicupola, Rhombicuboctahedron, Snub Square Antiprism, the Great Rhombcuboctahedron, and a 26-agon. The suggested name of a 26 sided shape is Icosikaihexagon.

6. Think of it as a possibly elongated cube.

The correct spelling is "rectangle" (a right angle quadrilateral, an elongated square).