I have a circle with N points on it, and I want to determine how many triangles can be formed using these points.
How can I do this?
Thanks!
Andrew
2026-05-15 02:39:02.1778812742
How many triangles can be formed from N points on a circle?
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Each set of $3$ of the $N$ points determines a triangle, and each triangle is determined in this way, so all you have to do is determine how many $3$-element subsets a set of $N$ things has. If you don’t already know this, you should read this article.