Geometry CH2 Lessons 2-5 through 2-9 Vocab

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Across
  1. 3. statements are listed in a logical order in the left column and corresponding reasons in the right column until a desired conclusion is reached.
  2. 4. A conditional statement and its converse can be combined into one statement called a biconditional statement. For a statement with a hypothesis 𝑝 and a conclusion 𝑞, the biconditional statement can be written in the form “𝑝 if and only if 𝑞,” which can be expressed as “𝑝 iff 𝑞” or 𝑝𝑞.
  3. 6. describes the meaning of a word. In mathematics, definitions can be written as true biconditional statements.
  4. 9. states that if two angles are complements to the same angle (or to congruent angles), then they are congruent.
  5. 10. a statement that you can prove. Once you have proven a theorem, it can be used as a reason in later proofs.
  6. 12. states that the sides of congruence statement can be interchanged.
  7. 13. states that any figure is congruent to itself.
Down
  1. 1. states that if two angles are supplements to the same angle (or to congruent angles), then they are congruent.
  2. 2. states that if two figures are congruent to a third, then they are congruent to each other.
  3. 5. states that all right angles are congruent.
  4. 7. states that two angles that form a linear pair are supplementary.
  5. 8. states that vertical angles are congruent.
  6. 11. an argument used to show that a conclusion is true. Proofs use given information, definitions, properties, postulates, and theorems to justify each step in the reasoning process used to reach a conclusion.