1no jagaran..
you have these as those triangles formed by all three vertices on the circle..
there are many more..
IF THERE R N PTS ON A CIRCLE THEN HOW MANY TRIANGLES R FORMED INCLUDING THE SMALLER TRIANGLES.
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10 Answers
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1didn't get it sir.
all the points lie on the circle where else will the vertices lie?
1jagaran... u joint all the pts on the circle to form triangles..wen u do that u actually make some others as well whose..vertices r inside the circle
1CAN THIS SUM REALLY BE SOLVED ??????
Other sums of this type can be solved by recursion but this sum is something unusual...i can't find any recurrence relation.
@ Shirsha : Is this YOUR doubt or have you taken this sum from some book ?
1this sum was given by nishant sir in the sheet of permutation and combination(edudigm)
49hmm............we can do this like this,...
umm first no of st lines possible=nC2
then no of Δs=nC2C3
giving Δs
but this includes Δs when the st lines r extended infinitely....