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  • 2021 April(Z04) Math Question 12

    Equation of a Line

    - Distance & Midpoint

    12. In the standard (x,y) coordinate plane, the point (2,1) is the midpoint of CD. Point  C has coordinates (6,8). What are the coordinates of point D ?
    Choice G

    $$ (2,1)=(\frac{x+6}{2},\frac{y+8}{2}) $$

    $$ x=-2;y=-6 $$

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