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Geometry - need expert help

by voodoo_child » Wed Nov 21, 2012 10:34 am
Perimeter of triangle ABC = 15. what is the area of triangle?

1) BC = 7
2) Angle ABC = 70 degree.

C) - (two equations - 1 We can use Cosine rule to find the two sides AND
2 a+b=15-7=8;

OA C
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Source: — Data Sufficiency |
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by Jim@StratusPrep » Wed Nov 21, 2012 12:59 pm
The answer is correct' but you will never have to use cosine, sine, tangent or cotangent trigonometry principles on the GMAT.
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by subhakam » Fri Dec 14, 2012 6:52 pm
Jim - can you please explain the solution ? I did not quite follow
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by puneetkhurana2000 » Fri Dec 14, 2012 11:03 pm
I agree with Jim.
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