SOLUTION: the number of distinct lines that can b formed by joining 20 points on a plane of which no 3 points are collinear

Question 891444: the number of distinct lines that can b formed by joining 20 points on a plane of which no 3 points are collinear
Answer by AnlytcPhil(1806) (Show Source): You can put this solution on YOUR website!

Since line segment AB is the same as line segment BA, order does not matter,
so we use combinations.  We have:

20 points CHOOSE 2 or C(20,2) = 190

Edwin

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