Answer : Number of points=21
⇒n=21
A chord connects circle at two points.
⇒r=2
⇒Number of chords from 21 points= nCr
⇒ nCr= 21C2
⇒21C2=210 chords.
Ans: 210 chords can be drawn through 21 points on a circle.
Answer : Number of points=21
⇒n=21
A chord connects circle at two points.
⇒r=2
⇒Number of chords from 21 points= nCr
⇒ nCr= 21C2
⇒21C2=210 chords.
Ans: 210 chords can be drawn through 21 points on a circle.