geometry

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Across
  1. 3. half of diameter
  2. 7. longest side of a triangle
  3. 11. 3d circle
  4. 13. when 2 edges meet
  5. 14. shape with no edges
  6. 17. same size sides
  7. 18. 3d square
  8. 19. shape with 5 sides
  9. 20. outside of shape
Down
  1. 1. triginomitry
  2. 2. 3d circle
  3. 4. 4 sided shape
  4. 5. inside of shape
  5. 6. a^2+n^2=c^2
  6. 8. trangle with square base
  7. 9. 3 sided shape
  8. 10. the length of inside of a 3d shape
  9. 12. 90 degrees
  10. 15. how full the inside of a shape is
  11. 16. triangle with circle base