| Answer | Crossword Clue |
|---|---|
| tetragonous | having four angles |
| squarest | having four equal sides and four right angles |
| tetragon | polygon having four angles or sides; quadrangle or quadrilateral |
| diamond | figure having four equal sides and two acute and two obtuse angles |
| quadrangular | having four angles and four sides; having the shape of a quadrangle |
| hypercube | a figure in a space of four or more dimensions having all its sides equal and all its angles right angles |
| hypercubes | HYPERCUBE, a figure in a space of four or more dimensions having all its sides equal and all its angles right angles |
