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      ·  7 years ago 

    since AB parallel DC and AD same length as BC
    either z=110° or z=180°-110° and x=y or x=180°-y
    form the picture I would say z=110° is the case and so x=y
    360°=110°+x+y+z
    250°=110°+x+y
    140°=2x
    x=70°

    answer x=70° y=70° z=110°

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