Trying Triangles from MGMAT

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Source: — Data Sufficiency |

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by jasonc » Sun Jun 01, 2008 2:03 pm
my fast guess (if i had less than a minute) would be D.

looks like a bunch of similar right triangles and either stem will give you enough to use a^2+b^2=c^2 to solve for the desired side.
I beat the GMAT! 760 (Q49/V44)