mathematical

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Across
  1. 1. +,-
  2. 3. an angle over 90 degrees
  3. 5. the out side of
  4. 8. part of
  5. 9. incorect
  6. 13. to change
  7. 15. the size of somthing
  8. 17. look into a mirrio
  9. 20. 3 sided shape
  10. 21. were you eat dinner
  11. 22. taking away
  12. 24. found in egypt
  13. 25. to the p_ _ _ _
Down
  1. 1. 4 equale sides
  2. 2. a pointed shape that cars stay clear of
  3. 4. 100 centimeter
  4. 6. 1/10 of a centimeter
  5. 7. to guess
  6. 10. 12 sided shape
  7. 11. 1 thousand meters
  8. 12. 10 sided shape
  9. 14. to take away
  10. 16. flown by little kids
  11. 17. the rest of
  12. 18. the werth of something
  13. 19. pointing up
  14. 23. to have nothing there