Math path

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Across
  1. 3. never intersect
  2. 6. supplementary when parallel
  3. 10. Assumed true.
  4. 12. If a=b, then b=a.
  5. 14. Switches if-then.
  6. 15. Intersects multiple lines
  7. 16. Negates if-then
  8. 17. Same size and shape
  9. 20. add up to 180°
  10. 21. a=a
  11. 22. The "if" part
  12. 23. always equal
  13. 24. Switches and negates if-then.
  14. 25. add up to 180°
  15. 26. if-then
  16. 27. meet at 90°
  17. 28. Unproven guess
Down
  1. 1. supplementary when parallel
  2. 2. lines that Never intersect
  3. 4. The "then" part
  4. 5. match when lines are parallel
  5. 7. rise over run
  6. 8. equal when parallel
  7. 9. If and only if.
  8. 11. If a=b and b=c, then a=c.
  9. 12. Never intersect, not parallel.
  10. 13. Disproves a statement
  11. 15. Proven statement.
  12. 18. equal when parallel
  13. 19. Opposite statement