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February 1, 2015

February 1, 2015

Posted by **dddd47906** on Monday, May 5, 2014 at 3:14pm.

How do you do it, not answer.

- URGENT! MATH! HELP! -
**dddd47906**, Monday, May 5, 2014 at 4:20pmHow many chords are determined by seven points on a circle?

How do you do it, not answer.

- Math -
**Steve**, Monday, May 5, 2014 at 6:45pmeach 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

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