SOLUTION: How many lines can be drawn through four coplanar points,no three of which are collunear

SOLUTION: How many lines can be drawn through four coplanar points,no three of which are collunear

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Question 977217: How many lines can be drawn through four coplanar points,no three of which are collunear
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
to draw lines u have to select points at a time (as no are collinear)
thus number of selections of such points is:

....since you have points, , and we have

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