Across
- 2. The general name for any four-sided polygon.
- 5. The distance from the center of a regular polygon to the midpoint of any side.
- 7. The name for the angles located inside a polygon.
- 8. A five-sided polygon; also the name of a famous U.S. defense building.
- 11. The name for the angles formed outside a polygon by extending one side.
- 12. The point where two sides of a polygon meet.
- 15. A polygon that has twelve sides and twelve angles.
- 16. A polygon that has exactly ten sides and ten angles.
- 17. A line segment connecting two non-adjacent vertices of a polygon.
- 18. A polygon with seven sides and seven angles.
- 19. A polygon with six sides, commonly seen in honeycombs.
Down
- 1. A polygon in which all sides are of equal length.
- 3. A polygon with nine sides, also known as an enneagon.
- 4. A specific type of triangle with at least two equal sides.
- 6. A polygon with exactly three sides.
- 8. The total distance around the outside edge of a polygon.
- 9. The term for a polygon where all sides and angles are equal.
- 10. An eight-sided polygon, the shape of a standard stop sign.
- 13. A polygon where all interior angles are less than 180 degrees.
- 14. A polygon with at least one interior angle greater than 180 degrees.