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OG - Quant Review PS - #85

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samstone
 Post subject: OG - Quant Review PS - #85
 Post Posted: Tue Jul 31, 2007 9:47 pm 
Hi,
Can you please give a detailed explanation of the answer for this question? I am still unsure of the explanation given in the book. Thanks very much. :roll:
Image
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Amrinder
 Post subject:
 Post Posted: Wed Aug 01, 2007 12:57 am 
Area of triangle =1/2 Base*ht

Base =C-1 (X axis)

Ht=b (Y axis)

Area =b(c-1)/2
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dbernst
 Post subject:
 Post Posted: Thu Aug 02, 2007 11:36 am 
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ManhattanGMAT Staff


Posts: 304
Amrinder, thanks for the explanation. Samstone, to prove this explanation, you could treat this as a "variables in the answer choices" problem plug in actual number for a, b, and c. However, it is much quicker to use Amrinder's technique and simply rely on the geometric formula for the area of a triangle.

-dan
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Guest
 Post subject:
 Post Posted: Mon Aug 06, 2007 10:27 am 
Thanks to both Amrinder and Dan for the explanations, it is very helpful.

Sam
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