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Wrong Explanation

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sushmit
 Post subject: Wrong Explanation
 Post Posted: Wed Jun 22, 2011 12:08 pm 
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Students


Posts: 3
Got this question in one of the MGMAT CAT


For the triangle shown above, where A, B and C are all points on a circle, and line segment AB has length 18, what is the area of triangle ABC?

(1) Angle ABC measures 30°.

(2) The circumference of the circle is 18.

(Could not paste the image :()

In its explanation it assumes AB as the diameter of the circle which is not correct, but still gives answer as C. Please correct it :)
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varun_783
 Post subject: Re: Wrong Explanation
 Post Posted: Wed Jun 22, 2011 12:26 pm 
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Course Students


Posts: 263
Hi Sushmit,

Does the diagram show any 90 degree angles in the triangle (by using the little square symbol)?

Can you please copy and paste the full explanation?

Thanks

Sunil
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jnelson0612
 Post subject: Re: Wrong Explanation
 Post Posted: Sat Jun 25, 2011 2:01 pm 
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ManhattanGMAT Staff


Posts: 1857
Thanks Sunil; we also really need the image.

_________________
Jamie Nelson
ManhattanGMAT Instructor
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