Logic and Proof Unit Vocabulary

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Across
  1. 2. formed by negating the hypothesis and conclusion of a statement
  2. 5. an example that shows a conjecture is false
  3. 8. statement that can be written in if-then form
  4. 12. formed by negating and switching the hypothesis and conclusion of a statement
  5. 13. a sentence that is either true or false
  6. 15. Lines that intersect at four right angles
  7. 16. visual way of displaying the relationships between sets
  8. 17. statements joined by the word or
Down
  1. 1. Angles that add to 90 degrees
  2. 2. making a conclusion based on observations and patterns
  3. 3. has the opposite truth value of the original statement
  4. 4. Angles that add to 180 degrees
  5. 5. a concluding statement reached using inductive reasoning
  6. 6. divides a segment into two equal halves
  7. 7. two or more statements joined by and or or
  8. 8. statements joined by the word and
  9. 9. having the same measure
  10. 10. angle that equals 90 degrees
  11. 11. formed by switching the hypothesis and conclusion of a statement
  12. 14. lists statements and reasons to justify steps in a problem