Posted by dddd47906 on Monday, May 5, 2014 at 3:14pm.
How many chords are determined by seven points on a circle?
How do you do it, not answer.

URGENT! MATH! HELP!  dddd47906, Monday, May 5, 2014 at 4:20pm
How many chords are determined by seven points on a circle?
How do you do it, not answer.

Math  Steve, Monday, May 5, 2014 at 6:45pm
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
Answer This Question
Related Questions
 maths  eight points lie on the circumference of a circle. one of them is ...
 math  n points are arranged on a cirlce and all the chords drawn. Let I(n) be ...
 math  n points are arranged on a cirlce and all the chords drawn. Let I(n) be ...
 Circle Geometry  chords in a circle  Let PQ, RS , and TU be parallel chords of...
 Maths  Around a circle i place 64 equally spaced points, so that there are ...
 math  the number of noncollinear points needed to determine a circle Two. The ...
 Math Help  Two points are chosen uniformly at random on the unit circle and ...
 Math  Two points are chosen uniformly at random on the unit circle and joined ...
 math  PQ and RS are 2 parallel chords of a circle such that PQ = 8 cm & RS = 6 ...
 Geometry  Two points are chosen uniformly at random on the unit circle and ...
More Related Questions