| Answer | Crossword Clue |
|---|---|
| rectangle | a four-sided plane figure with all its angles right angles, esp one with unequal adjacent sides |
| rectangles | RECTANGLE, a four-sided plane figure with all its angles right angles, esp one with unequal adjacent sides |
| 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 |
