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lesson 19.notebook                                 September 27, 2012



           Assignment:

           1­­>Set 19 (odds) ­ Due Monday (10/1)




                                                                        1
lesson 19.notebook                                                            September 27, 2012


            Lesson 19 Warm­Up:

            1) The formula for the area of a parallelogram is 
            A = bh.  Find A when b = 7 mm and h = 9 mm.

            2) Simplify:    125

            3) What is the mean of the prime numbers between 10 and 20?

            4) Sy swam one kilometer in 40 minutes.  The length of the 
            pool was 25 meters.  About how long did it take Sy to swim the 
            length?

            5) Using prime factorization, reduce:  375
                                                  1000




                                                                                                   2
lesson 19.notebook                                                               September 27, 2012


              Lesson 19:

              *polygon­­>closed plane figures with straight sides

              *regular polygon­­>a polygon with all sides equal and all angles equal

              *congruent­­>figures that are the same shape AND the same size

              *similar­­>figures that are the same shape...but not necessarily the 
              same size

              *dilation­­>an enlargement of a figure




                                                                                                      3
lesson 19.notebook                    September 27, 2012

             Examples ­ Lesson 19
             pg. 123

             A)  hexagon, irregular

             B)  C

             C)  octagon

             D)  dodecagon




                                                           4
lesson 19.notebook                                             September 27, 2012



              E)       ABEF    AFEB

              F)  triangle B

              G)  A, B, and D ­ similar; B and D ­ congruent




                                                                                    5

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8th pre alg -L19--sept27

  • 1. lesson 19.notebook September 27, 2012 Assignment: 1­­>Set 19 (odds) ­ Due Monday (10/1) 1
  • 2. lesson 19.notebook September 27, 2012 Lesson 19 Warm­Up: 1) The formula for the area of a parallelogram is  A = bh.  Find A when b = 7 mm and h = 9 mm. 2) Simplify: 125 3) What is the mean of the prime numbers between 10 and 20? 4) Sy swam one kilometer in 40 minutes.  The length of the  pool was 25 meters.  About how long did it take Sy to swim the  length? 5) Using prime factorization, reduce:  375              1000 2
  • 3. lesson 19.notebook September 27, 2012 Lesson 19: *polygon­­>closed plane figures with straight sides *regular polygon­­>a polygon with all sides equal and all angles equal *congruent­­>figures that are the same shape AND the same size *similar­­>figures that are the same shape...but not necessarily the  same size *dilation­­>an enlargement of a figure 3
  • 4. lesson 19.notebook September 27, 2012 Examples ­ Lesson 19 pg. 123 A)  hexagon, irregular B)  C C)  octagon D)  dodecagon 4
  • 5. lesson 19.notebook September 27, 2012 E)       ABEF AFEB F)  triangle B G)  A, B, and D ­ similar; B and D ­ congruent 5