How many chords can be drawn through 21 points on a circle??
robertchaliy:
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Answers
Answered by
5
Step-by-step explanation:
1 CHORD WILL BE THERE IN ANY CIRLCLE
oh
sorry answer is 40 try again please..
I'm really very sorry guys 210 is the correct answer sorry
ok
nC2
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hlo
it real di
ya
nope its not mine
Answered by
3
Step-by-step explanation:
We know that to draw a chord of a circle, only 2 points are required.
So,the number of chords that can be drawn through the given 21 points on a circle is =
21 C 2 =
2!(21−2)!21! = 2!19!21!
= 221×20 =210
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