Gopalgang higher hisec 2011 10
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Mehfuj Zahir
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Length of all the sides of an isocles triangle are integer valued.If the perimeter is 20 how many ways the triangle can be formed?
Last edited by Mehfuj Zahir on Fri Feb 04, 2011 12:20 am, edited 1 time in total.
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Mehfuj Zahir
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Re: Mymensingh higher sec 2011 10
Ans should be 4
Re: Gopalgang higher hisec 2011 10
but i think the answer is $8$ .
let $a, a, b$ are the sides of the triangle. so
$2a+b=20$
$a=\frac{20-b}{2}$
there are $8$ possible results of $(a,b)$ [$(9,2),(8,4),(7,6),(6,8),(5,10),(4,12),(3,14),(2,16),(1,18))$]( whereas a, b are positive integers.
let $a, a, b$ are the sides of the triangle. so
$2a+b=20$
$a=\frac{20-b}{2}$
there are $8$ possible results of $(a,b)$ [$(9,2),(8,4),(7,6),(6,8),(5,10),(4,12),(3,14),(2,16),(1,18))$]( whereas a, b are positive integers.
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nafistiham
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Re: Gopalgang higher hisec 2011 10
but,amlan da
Euclid says,
the summations of two sides in a triangle is larger than the other side.
so, the rightmost $5$ combos are incorrect.
Euclid says,
the summations of two sides in a triangle is larger than the other side.
so, the rightmost $5$ combos are incorrect.
\[\sum_{k=0}^{n-1}e^{\frac{2 \pi i k}{n}}=0\]
Using $L^AT_EX$ and following the rules of the forum are very easy but really important, too.Please co-operate.
Using $L^AT_EX$ and following the rules of the forum are very easy but really important, too.Please co-operate.
Re: Gopalgang higher hisec 2011 10
হায় হায়, এমন ভুল আমি কেমনে করলামnafistiham wrote:but,amlan da
Euclid says,
the summations of two sides in a triangle is larger than the other side.
so, the rightmost $5$ combos are incorrect.
thanx nafis
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