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by ukgmat » Tue Aug 23, 2016 4:06 am
I know the answers but i am not sure how to solve. Thanks in advance for any help!
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by GMATGuruNY » Tue Aug 23, 2016 5:26 am
Moving forward, please post only one problem per thread.
For the two problems above, I posted solutions here:
https://www.beatthegmat.com/2-problem-so ... 77780.html
https://www.beatthegmat.com/circle-and-t ... 13660.html
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by [email protected] » Tue Aug 23, 2016 9:35 am
Hi ukgmat,

I'm going to give you some hints so that you can try these questions again on your own:

For the first question, here are the math rules/patterns that you need to know:

1) Any time you see a diagonal line segment on a graph, you can draw a right triangle using that line as the hypoteneuse.
2) Right triangles on the GMAT are almost always pattern-based (angles or sides; at the very least, the Pythagorean Theorem). Here, we have a 1 and a √3, so we should be thinking 30/60/90.
3) Radii have the same length no matter what direction they go in.
4) Lines "add up" to 180 degrees.

For the second question, try drawing pictures. I bet that you can get tot he correct answer in under a minute.

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