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2.3 Drawing Conclusions

2.3 Drawing Conclusions. Procedure for Drawing Conclusions Found on page 72. Memorize theorems, definitions, and postulates Look for key words and symbols in the given info. Think of all the thms , defs , and posts that involve those keys

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2.3 Drawing Conclusions

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  1. 2.3 Drawing Conclusions

  2. Procedure for Drawing ConclusionsFound on page 72 • Memorize theorems, definitions, and postulates • Look for key words and symbols in the given info. • Think of all the thms, defs, and posts that involve those keys • Decide which thm, def, or post allows you to draw a conclusion • Draw a conclusion, and give a reason to justify the conclusion. Be certain that you have not used the reverse of the reason.

  3. Go over problems in the notes As a class we will go over odds, then evens will be assigned as homework. For credit: You must rewrite the given and the diagram, along with your conclusion and reason!

  4. Number 1 Conclusion: <B is a right angle Reason: If two lines are perpendicular, then they intersect at right angles

  5. Number 3 Conclusion: Ray XZ is an angle bisector Reason: If a ray divides an angle into two congruent angles, it bisects the angle.

  6. Number 5 Conclusion: AE = EC Reason: If a point divides a segment into two congruent segments, it is the midpoint. WRONG!!! Reason: If a point is a midpoint, then it divides a segment into two congruent segments

  7. Number 7 Conclusion: <PQS and <RQS are supplementary Reason: If the sum of two angles is a straight angle, then they are supplementary.

  8. Number 9 • Z is a midpoint • VZ = YZ Number 11 • F is a midpoint • BF = DF

  9. Homework Pg. 74 #2-12 Even

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