Problem Solving (PS) | Re: In the figure above, if ABCD is a parallelogram, then x = 30 40 60

Notice that the interior angle at B is 2y since opposite angles of a parallelogram are equal and therefore, x = 180 - 2y.

We can create the equation:

2y + y = 180

3y = 180

y = 60

Thus, x is 180 - 120 = 60.

Answer: C
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