Lost Letters

1234567891011121314151617181920212223242526
Across
  1. 2. The opposite of a statement.
  2. 3. The "if" part of an if-then statement.
  3. 5. Planes that never touch.
  4. 8. A math rule accepted without proof
  5. 11. Two angles summing to 180°.
  6. 13. Flip and negate a conditional statement.
  7. 14. Not parallel, not intersecting, different planes.
  8. 18. A statement proven using logic.
  9. 19. The final statement in a logical argument.
  10. 20. Rise over run in a graph.
  11. 21. A thing is always equal to itself.
  12. 25. Opposite sides of a transversal, outside parallel lines.
  13. 26. If a = b, then b = a.
Down
  1. 1. "If-then" logic rule.
  2. 4. Intersect at a 90° angle.
  3. 6. Never meet always the same distance apart.
  4. 7. One case that disproves a statement.
  5. 9. A math rule accepted without proof.
  6. 10. Opposite sides of a transversal, inside parallel lines.
  7. 12. Opposite angles formed by two intersecting lines.
  8. 15. An educated guess in math.
  9. 16. Flip the hypothesis and conclusion.
  10. 17. "If and only if" statement.
  11. 22. Two adjacent angles adding to 180°.
  12. 23. Negate both parts of a conditional statement.
  13. 24. Transitive