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March 28, 2017

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Given the coordinates of one endpoint of line segment AB and its midpoint M, find the coordinates of the other endpoint.

A(0,9), M(2,5)

  • geometry - ,

    Changes from A to M will be the same as the changes from M to B.

    The x coordinate of B will be 2 + 2 = 4 and the y coordinate will be 5 - 4 = 1.

    Write that as B(4,1)

  • geometry - ,

    The midpoint of
    PQ
    is
    =M, 1−5
    . One endpoint is
    =P, −3−8
    .
    Find the coordinates of the other endpoint,
    Q

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