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# if triangle BCD is an equilateral triangle and its area is

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if triangle BCD is an equilateral triangle and its area is [#permalink]  14 Mar 2008, 01:46
if triangle BCD is an equilateral triangle and its area is 9*sqrt(3), what is the area of ABD?
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CEO
Joined: 17 Nov 2007
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Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
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Kudos [?]: 2132 [0], given: 359

Re: area of a triangle [#permalink]  14 Mar 2008, 04:41
Expert's post
It seems that you something missed? I guess the problem has to have some information that fix point a.
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Re: area of a triangle [#permalink]  14 Mar 2008, 16:21
from the area -> length of bcd = 6, draw perpendicular from b cut DC at H. BH=6*sqrt(3)/2
Use pythagorean theorem on BHA -> HA, minus 3 (DH) u know AD. From there find the area...
sorry i'm lazy to calculate, i think this can help u
Re: area of a triangle   [#permalink] 14 Mar 2008, 16:21
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