Answer:
The value of B is 112°
Explanation:
In this parallelogram, ∠A amd ∠B are adjacent angles. So when adjacent angles are add up, it will form 180°. In order to find ∠B, you have to substract 68° from 180° :
Let ∠A = 68°,
∠ B = 112°
The opposite sides are parallel so figure is a parallelogram.
Consecutive angles are supplementary, thus
∠ A + ∠ B = 180°, that is
68° + ∠ B = 180° ( subtract 68° from both sides )
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