Question 1088489
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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.


<U>Answer</U>. 18 lines.
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Solved.