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GMATPrep Geometry

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Senior | Next Rank: 100 Posts
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by smushkas » Fri Mar 14, 2008 7:35 am
Hey guys,

Can anyone explain how to do this problem? I used to know the way, but forgot completely. :(

Thanks in advance!

OA C
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by torontogmat.com » Fri Mar 14, 2008 11:51 am
If the triangle is equilateral then AB = BC = CA, so the circumference is 36.

pi*d = 36, so d is just less than 12.
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by camitava » Sat Mar 15, 2008 5:50 am
smushkas,
This is a geometry formula - I forgot in detail how to derive and all those- but it is again mentioned in GMATPrep Software. For more details, refer the attachment. I think now u can get what to do! If not, let me know and I will try to explain my approach.
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Correct me If I am wrong


Regards,

Amitava
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by xeqtr » Sat Mar 15, 2008 11:46 am
Though you can deal with lots of geometry formulas or concepts in here, basically you have 3 chords which formed the triangle, and all the chors lengths are equal, which means they each represent an arc of 120 degrees, since you are given the length of 2 arcs you can easily apply toronto's way for the rest :wink:
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