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FIGURE 6.1
                              The center of mass of a triangle. (Refer to Pb. 6.6).

                             Pb. 6.6 Consider the triangle ∆(ABC), in which D is the midpoint of the BC
                             segment, and let the point G be defined such that  (GD =  1  (AD ).  Assuming
                                                                             )
                                                                                3
                             that z , z , z are the complex numbers representing the points (A, B, C):
                                    B
                                 A
                                       C
                                a. Find the complex number z  that represents the point G.
                                                           G
                                b. Show that  (CG =  2  (CF )   and that F is the midpoint of the segment
                                                )
                                                   3
                                   (AB).





                             6.3  Complex Conjugation and Division
                             DEFINITION The complex conjugate of a complex number z, which is
                             denoted by  , is given by:z


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