In the parallelogram ABCD, angle A= (3x – 15), angleB = (2x + 5)º. Find the values of x and angle D.
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In ∥gm opposite angles are supplementary.
Therefore,
∠B+∠D=180
2x+25+3x−5=180.
∠B=2x+25=(2∗32)+25=89
∠D=3x−5=(3∗32)−5=91
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