SOLUTION: if a plane contains 20 points no three of which are collinear how many different triangles can be formed using these points

SOLUTION: if a plane contains 20 points no three of which are collinear how many different triangles can be formed using these points

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Question 12298: if a plane contains 20 points no three of which are collinear how many different triangles can be formed using these points
Answer by askmemath(368) (Show Source): You can put this solution on YOUR website!
Do you know Permutations and Combinations?
YOu require 3 points to make a triangle.
SInce none of the points are collinear,from 20 points we can get 3 points in 20C3 ways.
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