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17 November, 17:13

AB = x + 2

DC = 12-x

AD - 2y - 5

BC=Y

Quadrilateral ABCD is a parallelogram if both pairs of opposite sides are congruent. Show that quadrilateral ABCD is a parallelogram

by finding the lengths of the opposite side pairs

res-

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Answers (1)
  1. 17 November, 20:32
    0
    AB = 7, DC = 7, AD = 5, BC = 5

    Step-by-step explanation:

    If you set AB equal to DC you get:

    x+2=12-x

    2x=10

    x=5

    If you set AD equal to BC you get:

    2y-5=Y

    y=5

    Solve for each side of the quadrilateral and you get:

    AB = 7, DC = 7, AD = 5, BC = 5
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