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  1. Beat the Computer! Geometry Vocabulary for Unit 2 Chris Giovanello, LBUSD Math Curriculum Office, 2004

  2. Directions: • A slide will appear with a term • Say the definition aloudbefore thecomputer can answer (5 sec.) • You will hear a sound when the slide changes Chris Giovanello, LBUSD Math Curriculum Office, 2004

  3. conditional Chris Giovanello, LBUSD Math Curriculum Office, 2004

  4. pg. 68 conditional: another name for an if-then statement If it is raining, then I will need my umbrella. Chris Giovanello, LBUSD Math Curriculum Office, 2004

  5. hypothesis Chris Giovanello, LBUSD Math Curriculum Office, 2004

  6. pg. 68 hypothesis: the part following the “if” in an if-then statement If it is raining, then I will need my umbrella. Chris Giovanello, LBUSD Math Curriculum Office, 2004

  7. conclusion Chris Giovanello, LBUSD Math Curriculum Office, 2004

  8. pg. 68 conclusion: the part following the “then” in an if-then statement If it is raining, then I will need my umbrella. Chris Giovanello, LBUSD Math Curriculum Office, 2004

  9. truth value Chris Giovanello, LBUSD Math Curriculum Office, 2004

  10. pg. 69 truth value: the value, true or false, of a conditional statement Chris Giovanello, LBUSD Math Curriculum Office, 2004

  11. converse Chris Giovanello, LBUSD Math Curriculum Office, 2004

  12. pg. 69 converse: a new statement that switches the hypothesis and conclusion of the original conditional statement Chris Giovanello, LBUSD Math Curriculum Office, 2004

  13. biconditional Chris Giovanello, LBUSD Math Curriculum Office, 2004

  14. pg. 75 biconditional: a statement made by connecting the conditional and its converse with the words “if and only if” Chris Giovanello, LBUSD Math Curriculum Office, 2004

  15. deductive reasoning Chris Giovanello, LBUSD Math Curriculum Office, 2004

  16. pg. 82 deductive reasoning: the process of reasoning logically from given statements to a conclusion Chris Giovanello, LBUSD Math Curriculum Office, 2004

  17. Law of Detachment Chris Giovanello, LBUSD Math Curriculum Office, 2004

  18. pg. 83 Law of Detachment: If a conditional is true and its hypothesis is true, then its conclusion is true. If p  q is a true statement and p is true, then q is true. Chris Giovanello, LBUSD Math Curriculum Office, 2004

  19. Law of Syllogism Chris Giovanello, LBUSD Math Curriculum Office, 2004

  20. pg. 83 Law of Syllogism: allows you to state a conclusion from two true conditional statements when the conclusion of one statement is the hypotheses of the other. If p  q and q  r are true statements, then p  r is true. Chris Giovanello, LBUSD Math Curriculum Office, 2004

  21. vertical angles Chris Giovanello, LBUSD Math Curriculum Office, 2004

  22. vertical angles: two angles whose sides are opposite rays pg. 96 1 2 1 and 2 are vertical angles Chris Giovanello, LBUSD Math Curriculum Office, 2004

  23. adjacent angles Chris Giovanello, LBUSD Math Curriculum Office, 2004

  24. adjacent angles: two coplanar angles that share a common vertex and side, but have no common interior points pg. 96 2 1 3 4  1 &  2 are adjacent angles  3 &  4 are adjacent angles Chris Giovanello, LBUSD Math Curriculum Office, 2004

  25. complementary angles Chris Giovanello, LBUSD Math Curriculum Office, 2004

  26. 2 1 complementary angles: two angles whose sum measures 90º pg. 96 55 35 X Y X & Y are complementary 1 & 2 are complementary Chris Giovanello, LBUSD Math Curriculum Office, 2004

  27. supplementary angles Chris Giovanello, LBUSD Math Curriculum Office, 2004

  28. 45 supplementary angles: two angles whose sum measures 180º pg. 96 Y 135 1 2 X X & Y are supplementary 1 & 2 are supplementary Chris Giovanello, LBUSD Math Curriculum Office, 2004

  29. linear pair Chris Giovanello, LBUSD Math Curriculum Office, 2004

  30. linear pair: if two adjacent angles share one side but the two sides they do not share are not opposite rays 1 2 1 & 2 are a linear pair Chris Giovanello, LBUSD Math Curriculum Office, 2004

  31. theorem Chris Giovanello, LBUSD Math Curriculum Office, 2004

  32. pg. 98 theorem: a statement that must be proved to be true Chris Giovanello, LBUSD Math Curriculum Office, 2004

  33. paragraph proof Chris Giovanello, LBUSD Math Curriculum Office, 2004

  34. pg. 98 paragraph proof: a proof written as sentences in a paragraph Chris Giovanello, LBUSD Math Curriculum Office, 2004