Question 1088489: There are 4 points A,B,C,and D on line l and another four points W,X,Y, and Z on a different line parallel to line l. How many distinct lines can be drawn that includes exactly two of these 8 points?
Answer by ikleyn(52879)   (Show Source):
You can put this solution on YOUR website! .
1 line containing four points A, B, C and D.
1 line containing four points W, X, Y and Z.
4 lines connecting point A with points W, X, Y and Z;
4 lines connecting point B with points W, X, Y and Z;
4 lines connecting point C with points W, X, Y and Z;
4 lines connecting point D with points W, X, Y and Z.
In all, 1 + 1 + 4*4 = 18 lines.
Answer. 18 lines.
Solved.
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