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Review: Angles of a Parallelogram
Explanation
Since ABCD is a
parallelogram, facing angles are equal, as they in fact appear to be. And all
of the angles add up to 90 times the number of angles:
Meanwhile, x and
the angle next to it, 2y, are
complementary to the full measure of a line, which is 180 degrees. Therefore,
The correct answer is (C).
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