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10 September, 17:29

Two angles of a quadrilateral each measure 70°. A third angle of the quadrilateral measures 115°. What is the measure of the fourth angle of the quadrilateral?

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  1. 10 September, 17:45
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    Quadrilateral's angles add up to 360 degree

    So ...

    70+70+115+x=360

    255+x=360

    x=360-255

    x=105 degrees

    Hope I didn't mess up for your sake.
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