Quantitative-Geometry

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danjuma: Senior | Next Rank: 100 Posts; Posts: 89; Joined: Thu Aug 26, 2010 9:29 am; Thanked: 4 times

by danjuma » Wed Oct 06, 2010 9:48 am

1. What is the area of triangle ABC?

A. The measures of angles ABC, CAB and ACB are x, 2x and 3x.

B. The lenght of AC is 5.

Thanks

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Source: Beat The GMAT — Problem Solving | Wed Oct 06, 2010 9:48 am

narik11: Senior | Next Rank: 100 Posts; Posts: 49; Joined: Thu Aug 26, 2010 11:08 pm; Thanked: 2 times

by narik11 » Wed Oct 06, 2010 10:08 am

danjuma wrote:1. What is the area of triangle ABC?

A. The measures of angles ABC, CAB and ACB are x, 2x and 3x.

B. The lenght of AC is 5.

Thanks

From option 1: You can find the angles to be 30,60,90.
But u don't know the length of the sides to calculate the area.

From option 2: is insufficient.

From 1 and 2: you can find the sides using (1:V3:2) as the angles are 30,60,90.

Hence C

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