Across
- 1. A shape with nine sides
- 5. Perimeter of a circle
- 11. Line from any side of a circle to another
- 12. All sides/angles are equal
- 15. Triangle with no equal sides/angles
- 16. Shape with five sides
- 19. Capacity of a 3D shape
- 20. Half of the diameter
Down
- 2. Angle that is 90 - 180°
- 3. A four sided shape
- 4. Cuts thru 2 parallel lines
- 6. Triangle with 90° angle
- 7. A shape with ten sides
- 8. Set starting point, no end
- 9. A kind of quadrilateral
- 10. Angle that is 180 - 360°
- 13. Goes on indefinitely
- 14. A shape with six sides
- 17. Opposite angles are ____
- 18. Space inside a polygon