How many chords are determined by seven points on a circle?

Question

How do you do it, not answer.

Answer 1

How many chords are determined by seven points on a circle?

How do you do it, not answer.

Answer 2

each point of the 7 is connected to 6 others.

So, going through all 7 points, you have 7*6 = 42 connections.

But, having gone all the way around, you have drawn each chord twice, once from each end. So, divide the total by 2 to get

7*6/2 = 21 chords