When there are $11$ points on the circle, how many different triangles can be formed by connecting three points? A. $165$A. $165$ B. $330$ C. $990$ D. $1331$ E. $495$
1. Because $3$ points must be chosen out of $11$ points on the circle and order does not matter, $\cfrac{{11}\times{10}\times{9}}{3\times{2}\times{1}}=165$ triangles can be formed. No More Steps
