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13 December, 10:14

The measure of the supplement of a 129 degree angle

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  1. 13 December, 12:02
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    The supplement is 51 degrees

    Step-by-step explanation:

    Supplementary angles add to 180 degrees

    Let x be the supplement

    x+129 = 180

    Subtract 129 from each side

    x+129-129 = 180-129

    x = 51
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