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Math Help - Trapezoids

  1. #1
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    Trapezoids

    If AB = 21 and EF = 18 then DC = ?

    EF is the median
    AB is the base
    DC is the top

    could someone help me please???
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  2. #2
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    Quote Originally Posted by lax600 View Post
    If AB = 21 and EF = 18 then DC = ?
    EF is the median, AB is the base, DC is the top
    The length of the median is the average of the two lengths of the bases.
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