find the measure of an angle that is double its supplement.
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120 is the angle that is double of its supplement.
It's supplement is 60.
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the one supplement angle is taken by X and twice of supplement angle is 2X. So that it remains two supplement that is measured by angle at 180 degree and then consider it as X x+2x=180°, 3x=180°, x=180÷3=60°, 2×60=120°. Therefore, two supplement angles takes place by 180 degree....
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