When there are $12$ points on the circle, how many different triangles can be formed by connecting three points? A. $220$A. $220$ B. $440$ C. $1320$ D. $1728$ E. $660$
1. Because $3$ points must be chosen out of $12$ points on the circle and order does not matter, $\cfrac{{12}\times{11}\times{10}}{3\times{2}\times{1}}=220$ triangles can be formed. No More Steps
