find angle A in trapezoid

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Problem

Step-by-step solution

Since $BC \parallel AD$, consecutive interior angles are supplementary. Thus, $m\angle A + m\angle B = 180^\circ$. Given $m\angle B = 110^\circ$, $m\angle A = 180^\circ - 110^\circ = 70^\circ$.

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Answer

70^\circ

find angle A in trapezoid

Problem

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