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Algebra

Cool goIITian

 Joined: 25 Nov 2008 Post: 66
28 Oct 2009 20:58:04 IST
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pls explain rates assured NUMBER OF QUADRILATERALS THAT CAN BE MADE USING VERTICES OF A POLYGON OF
Engineering Entrance , JEE Main , JEE Advanced , Mathematics , Algebra

pls explain rates assuredNUMBER OF QUADRILATERALS THAT CAN BE MADE USING VERTICES OF A POLYGON OF TEN SIDES AND HAVING EXACTLY TWO SIDES COMMON WITH THE POLYGON

Scorching goIITian

Joined: 10 Apr 2009
Posts: 223
28 Oct 2009 23:47:04 IST
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Is it 40 ?

Cool goIITian

Joined: 25 Nov 2008
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31 Oct 2009 21:19:36 IST
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New kid on the Block

Joined: 10 May 2009
Posts: 21
31 Oct 2009 21:27:43 IST
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total no. of quadilaterals= 10P2 - 10

= 90 - 10

= 80

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