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If m∠2=27 what is the measure of the supplement of ∠GBC

If m∠2=27 what is the measure of the supplement of ∠GBC-example-1

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m < 2 = 27...and because < GBC is vertical from < 2, they are equal because vertical angles are equal.  Supplementary angles are two angles when added together = 180. So the supplement for < GBC is 180 - 27 = 153
User Lchamp
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