krnverma wrote:
Q: In the figure above, points P and Q lie on the circle with center O. What is the value of S.
a)1/2
b)1
c)Root 2
d)Root 3
e)(Root 2)/2
OA:
B
Another question where I fell in the trap of the classic mistake - "predictable wrong choice in the answer choices". Could some one explain the Math behind the answer?
Thank you!
The sides of a 30-60-90 triangle are proportioned x : x√3 : 2x.
Whenever you see √3 in a geometry question, look for -- or DRAW -- a 30-60-90 triangle.
Given (-√3, 1), y=1 and |x|=√3 represent the legs of a 30-60-90 triangle in which the sides are 1:√3:2.
Thus, we get the following drawing:
The correct answer is
B.
Last edited by
GMATGuruNY on Mon Aug 08, 2011 7:54 am, edited 2 times in total.
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