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Length of QT

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by LalaB » Mon Feb 13, 2012 12:56 pm
A is the answ


qrt=rst+rts rst=x
it means that tr=rs. since qt=tr . then qt=rs=10

B is insuff, since no info about any side of the triangle
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by pemdas » Mon Feb 13, 2012 3:46 pm
riju, did you post that?

it's a, outer angle relationship indicates TR=RS, hence we know QT.
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by GMATGuruNY » Mon Feb 13, 2012 6:26 pm
I posted a solution to a very similar problem here:

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by rijul007 » Mon Feb 13, 2012 8:44 pm
pemdas wrote:riju, did you post that?

it's a, outer angle relationship indicates TR=RS, hence we know QT.
lol.. i dont know where my brain was at :D
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