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Geom2­2hour4.notebook                                        September 12, 2011



          Agenda for the day:
          • questions on 2.1 homework
          • 2.2 activity with netbooks
          • complete 2.2 as a class with notes
          • exit slip
          • work on homework if time permits

         By the end of class today, you should be able to:
         1. Define complementary and supplementary angles.
         2. Use complementary and supplementary angles in 
             2­column proofs.




        Questions on 2.1 homework?




                                                                                  1
Geom2­2hour4.notebook                                  September 12, 2011




            BELL WORK:

               A = 64o

            What is the supplement to    A?

            What is the complement to    A?




        2.2 ­ Complementary and Supplementary Angles




        supplementary angles ­ 2 angles are supplementary if the 
        sum of their measures is 180o. 

        complementary angles ­ 2 angles are complementary if 
        the sum of their measures is 90o.




                                                                            2
Geom2­2hour4.notebook                                          September 12, 2011



         Supplementary and complementary angles 
         DO NOT need to be adjacent (share a ray).


         Examples of supplementary angles:
                                                        B
                                                        100o


                 7 12                        80o
                                                   A




          If    ABC is yo, what is the complement of    ABC?

          the supplement?




                           1. Define complementary and supplementary 
                               angles.
                           2. Use complementary and supplementary 
                               angles in 2­column proofs.




                                                                                    3
Geom2­2hour4.notebook                  September 12, 2011




          EXIT SLIP: p.69 #1,2


          HOMEWORK: p.69 #3,4,6­9,12

          Due Wednesday




                                                            4

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Geom2-2

  • 1. Geom2­2hour4.notebook September 12, 2011 Agenda for the day: • questions on 2.1 homework • 2.2 activity with netbooks • complete 2.2 as a class with notes • exit slip • work on homework if time permits By the end of class today, you should be able to: 1. Define complementary and supplementary angles. 2. Use complementary and supplementary angles in  2­column proofs. Questions on 2.1 homework? 1
  • 2. Geom2­2hour4.notebook September 12, 2011 BELL WORK:    A = 64o What is the supplement to    A? What is the complement to    A? 2.2 ­ Complementary and Supplementary Angles supplementary angles ­ 2 angles are supplementary if the  sum of their measures is 180o.  complementary angles ­ 2 angles are complementary if  the sum of their measures is 90o. 2
  • 3. Geom2­2hour4.notebook September 12, 2011 Supplementary and complementary angles  DO NOT need to be adjacent (share a ray). Examples of supplementary angles: B 100o 7 12 80o A If    ABC is yo, what is the complement of    ABC? the supplement? 1. Define complementary and supplementary  angles. 2. Use complementary and supplementary  angles in 2­column proofs. 3
  • 4. Geom2­2hour4.notebook September 12, 2011 EXIT SLIP: p.69 #1,2 HOMEWORK: p.69 #3,4,6­9,12 Due Wednesday 4