Across
- 3. Four equal sides and four right angles
- 7. Triangle with all sides and angles equal
- 9. Eight-sided polygon, like a stop sign
- 11. Six-sided polygon
Down
- 1. Opposite sides equal and parallel
- 2. Triangle with two equal sides and two equal angles
- 4. No sides or angles, perfectly round
- 5. Triangle with no equal sides or angles
- 6. Five-sided polygon
- 8. Opposite sides equal, all right angles
- 10. All sides equal, but no right angles