Wrong Explanation

[sushmit]

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 :)

[messi10]

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

[jnelson0612]

Thanks Sunil; we also really need the image.