Bunuel wrote:
If four lines intersect as shown in the figure above, what is the value of (x + y)?
(A) 140
(B) 130
(C) 120
(D) 110
(E) 100
We can see there are several triangles in this diagram, but let’s only concentrate on two of them. The first one (the smaller one) is the one with the two 30-degree angles. The second one (the larger one) is the one that is composed of the triangle with the x-degree angle and the quadrilateral with the
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