Geom4-3

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Geom4-3

  1. 1. Geom4­3.notebook November 07, 2011 BELL WORK: Draw a diagram and write a prove and given statement for  the following: If two triangles are congruent, then any pair of  corresponding medians are congruent. Agenda for today: • section 4.3 • exit slip • return 4.1­4.2 quiz • discuss binders and notes • pass back graded papers 1
  2. 2. Geom4­3.notebook November 07, 2011 4.3 ­ A Right­Angle Theorem    1 and    2 are supplementary 1 2    1 =    2 Theorem: If two angles are both supplementary and     congruent, then they are right angles. **Note: From now on, whenever 2 angles form a straight angle, the  two angles are supplementary. No formal statement of this will be  necessary. A example 1: Given: AB = AC     BD = CD Conclusion: AD is an altitude B D C 2
  3. 3. Geom4­3.notebook November 07, 2011 B Given: AB = AD     BC = CD E Prove: AC is the perpendicular  A C      bisector or BD D EXIT SLIP: p. 182 #1 homework: p.182 #2­7 due Wednesday 3

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