Reasoning and Proof

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Across
  1. 6. Using logic to prove truth.
  2. 7. a=b then a/c = b/c.
  3. 8. True by looking at specific cases.
  4. 10. if a=b then b can be substituted for a.
  5. 12. If a = b then b = a
  6. 15. a = a.
Down
  1. 1. a=b then ac = bc.
  2. 2. Angles that share a common ray but no interior.
  3. 3. Statements accepted as true.
  4. 4. a=b then a+c = b+c.
  5. 5. Example showing a conjecture to be false.
  6. 9. Adjacent angles whose no common ray are oppo.
  7. 11. if a=b and b=c then a=c.
  8. 12. a=b then a-c = b-c.
  9. 13. A statement believed to be true.
  10. 14. Prove a statement using logical steps.