In the figure above, if PQRS is a parallelogram, then y-x=? Solution
Correct Answer: Option A
In parallelogram corresponding angles are equal and consecutive angles are supplementary (supplementary angles are two angles that add up to 180°), thus: 140=2y
--> y=70;
2y+x=180 --> 140+x=180
-->x=40;
Therefore, y−x=70−40=30.
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