Merging similar topics. As for your question: yes, ABC could be 70-70-40 triangle as well.Bunuel
I feel this question has a significant gap --- is the original diagram drawn to scale or not
Of course, on the GMAT, we know "Figures are drawn as accurately as possible. Exceptions will be noted
." I discuss this in a blog post. http://magoosh.com/gmat/2012/gmat-trick ... -possible/
This is a crucial fact for students to keep in mind when interpreting GMAT diagrams. IF
this diagram is purporting to be drawn as accurate as possible, then it's an exceptionally poor diagram. That angle looks nothing like a 70 degree angle. If it's drawn to scale, though, we have to accept that the diagram is somewhat close to symmetrical, and therefore, the 70-70-40 triangle would not be possible. IF
the diagram is not drawn to scale, which I suspect was the intent of the author, that needs to be explicitly stated. Then, the 70-70-40 triangle would be possible. Any bilateral symmetry is out the window if it's not drawn to scale. Here's a scaled diagram of the figure with the 70-70-40 triangle.
isosceles triangles.JPG [ 25.57 KiB | Viewed 1016 times ]
I believe, either way, the answer would be (E)
. Nevertheless, I think this is a crucial issue for students to consider while analyzing the possibilities for a given diagram on the GMAT.
What do others think?
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