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Geom3­1hour4.notebook                                                  October 03, 2011




               BELL WORK:
               Write a 2­column proof for the following.

               Given: Diagram as shown.
                         1 =    2.                     1   2   3   4
               Prove:    2 =    3.




              Agenda for Today:
               • section 3.1
               • exit slip
               • return Ch. 2 tests and other homework




                                                                                          1
Geom3­1hour4.notebook                                                    October 03, 2011




          3.1 ­ What are congruent figures?

          After this lesson, you should be able to:
          1. Define congruent figures.
          2. Accurately identify corresponding parts of figures.

          Read on p.111 ­ Introduction

        Congruent triangles        all pairs of corresponding parts are congruent.




          A                    D                How do we write that these 
                                                triangles are congruent?




          B              C E               F




                                                                                            2
Geom3­1hour4.notebook                                                  October 03, 2011



        Congruent polygons         all pairs of corresponding parts are congruent.
                                                    N
                        T                                      Z
                                      W

           R                      U                 L
                                                         P
                        Y                       E
                             C
                 F




          Check out the paragraph under the 
          definition of congruent polygons on p. 112! 
          Look at you guys being ahead of the game!




          Congruent triangles??



                 D




                                                                   U
                        R                   T




                                                                          Y


                                                                                          3
Geom3­1hour4.notebook                                                October 03, 2011



         A new use for the REFLEXIVE PROPERTY!


                                  H




                        X         S            Q




         Reflexive Property: Any segment or angle is congruent to itself.




       p.113 Sample Problem 1
                                               D         M              C
                                                2   1



                                                             4   3
                                        A           N            B




                                                                                        4
Geom3­1hour4.notebook                                        October 03, 2011



        p.114 Sample Problem 2                       E



                                                 Q       R
                                                     P

                                             5            7
                                                 6       8
                                         F                    G




              EXIT SLIP
                  ERC =          ?
                                     E                         C




                                     R                         T



            HOMEWORK: p.114 #2,3,4
            Due Wednesday



                                                                                5
Geom3­1hour4.notebook   October 03, 2011




                                           6

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Geom3-1hour4

  • 1. Geom3­1hour4.notebook October 03, 2011 BELL WORK: Write a 2­column proof for the following. Given: Diagram as shown.       1 =    2. 1 2 3 4 Prove:    2 =    3. Agenda for Today: • section 3.1 • exit slip • return Ch. 2 tests and other homework 1
  • 2. Geom3­1hour4.notebook October 03, 2011 3.1 ­ What are congruent figures? After this lesson, you should be able to: 1. Define congruent figures. 2. Accurately identify corresponding parts of figures. Read on p.111 ­ Introduction Congruent triangles  all pairs of corresponding parts are congruent. A D How do we write that these  triangles are congruent? B C E F 2
  • 3. Geom3­1hour4.notebook October 03, 2011 Congruent polygons all pairs of corresponding parts are congruent. N T Z W R U L P Y E C F Check out the paragraph under the  definition of congruent polygons on p. 112!  Look at you guys being ahead of the game! Congruent triangles?? D U R T Y 3
  • 4. Geom3­1hour4.notebook October 03, 2011 A new use for the REFLEXIVE PROPERTY! H X S Q Reflexive Property: Any segment or angle is congruent to itself. p.113 Sample Problem 1 D M C 2 1 4 3 A N B 4
  • 5. Geom3­1hour4.notebook October 03, 2011 p.114 Sample Problem 2 E Q R P 5 7 6 8 F G EXIT SLIP ERC = ? E C R T HOMEWORK: p.114 #2,3,4 Due Wednesday 5
  • 6. Geom3­1hour4.notebook October 03, 2011 6