Math Crossword

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Across
  1. 1. Equal and opposite to each other
  2. 4. Its measure between 90 and 180
  3. 5. Mathematical sentence that uses = sign
  4. 8. Divides an angle into two congruent angles
  5. 10. You can find me in Letter "F"
  6. 11. Angle whose measure is 180
  7. 13. Convincing argument that uses deductive reasoning
  8. 14. You can find me in letter "Z"
  9. 16. Sum of 90
  10. 19. Neighbors with common side and common vertex
  11. 20. Formed by 2 rays with the same endpoint
Down
  1. 2. Its measure between 0 and 90
  2. 3. Non-coplanar , not parallel and not intersect
  3. 6. You can find me at the beginning of the proof
  4. 7. 6 sided shape
  5. 9. Angles that have the same measure
  6. 12. Conjecture that is proven
  7. 15. Sum of 180
  8. 17. They will never meet
  9. 18. Flat surface with no thickness