Across
- 1. . isosceles
- 5. . pentagon
- 8. . complementary
- 11. . straight-line
- 12. . decagon
- 15. . revolution
- 16. . corresponding
- 18. . rectangle
- 19. . opposite
- 20. . scalene
- 21. . hexagon
- 24. . trapezium
- 27. . equal
- 28. . triangle
- 29. . exterior
- 30. . equal
- 31. . rhombus
- 33. . parallelogram
- 34. . acute
- 35. . nonagon
Down
- 2. . supplementary
- 3. . obtuse
- 4. . vertically
- 6. . octagon
- 7. . around-a-point
- 9. . interior
- 10. . supplementary
- 13. . equilateral
- 14. . right
- 17. . co-interior
- 22. . alternate
- 23. . kite
- 25. . reflex
- 26. . quadrilateral
- 32. . square