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6.1 - Copy

# 6.1 - Copy - 6-1/2 A Closer Look at Proof A How a Deductive...

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6-1/2 A Closer Look at Proof A) How a Deductive System Works a. What are the three undefined terms of Geometry? b. How many postulates do we have? c. We build our definitions and theorems using these undefined terms and postulates i. Ex) The distance PQ was defined to be the positive number given by the Distance Postulate ii. Ex) a set of points is collinear if all points of the set lie on the same line B) Indirect Proof a. Supposition i. Opposite of the statement that you are trying to prove 1. use the supposition and continue your argument until

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6.1 - Copy - 6-1/2 A Closer Look at Proof A How a Deductive...

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