Triangle Problem DS Help

Question

Help with this problem I found on paper test..

game over · Answer

Statement (2) alone is not sufficient. 

Statement (1) alone is sufficient. 
Since we know the coordinates of p, we know the height of the triangle. 
Using the law of sines, we are able to compute the length of RP. Hence we are able to compute the area of the triangle (which is RP/2 * h). 

hence, (A).

sgrover · Answer

(A)

Given P's coordinates, we can calculate side of triangle as
2/3 = side*sin60
once we have side, area = sqrt(3)/4 *side^2

necromonger · Answer

(1) is enough, 

if we know height of an equ. triangle, then area = h^2/rt(3).

jamesrwrightiii · Answer

How do you get the area of triangle without using sine, cosine, etc. Those areas are not testable on GMAT

ps_dahiya · Answer

I think you forgot to read "EQUILATERAL TRIANGLE". If you know the height of an equilateral triangle then you can find the area. In case of A height is 2/3 and this bisects the side RQ. Using pythagoras we get side = 4/3 (SQRT(1/3)) and area can be calculated.

Triangle Problem DS Help

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