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 Community Discussion Question:
P & C
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 30 Sep 2008 20:54:28 IST
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GIVEN SIX LINES OF LENGTHS 2, 3, 4,5,6,7 UNITS, THE NUMBER OF TRAINGLES THAT CAN BE FORMED BY THESE LINES IS?
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TRIVVAGIAN |
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for a triangle to be formed we need to have sum of any two sides to be greater than the third side. so we cancel out the combinations like 2,3,5; 2,3,6; 2,3,7; 2,4,6; 2,4,7; 2,5,7; 3,4,7 so the answer is 6C3 - 7 = 13.
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2 Oct 2008 12:40:39 IST
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let AB , BC , CA lengths
sum of the two sides should be greater than third
difference of two sides should be lessthan third.
AB+AC>BC
AB-AC<BC
ANS (2,3,4)(3,4,5)(3,4,6)(4,5,6)(4,5,7)(4,6,7)(5,6,7).
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2 Oct 2008 12:49:58 IST
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Sahil is corrrect-However rate me if I am correct too:
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"Trifles lead to perfection, and perfection is no trifle."
- Michaelangelo
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