3 lines can tersect at most 3C2 = 3 points only. So 3 points
of intersection form one triangle.
If the 3 lines are parallel,
then there is no tersection of lines.Therefore , no triangle is
formed.
If any ewo lines are parallel, and the 3rd is not parallel,
then there one non parallel line intersect the other two parallel line at 2 points. No triangle
is formed in this case.
All 3 lines can pass through one single
point. We say then the 3 lines are concurrent at one point. So there one limitting point
triangle of zero dimension and zero area.
So the in the first case
only the 3 points of intersection forma triangle. In no case there can be more than one
triangle.
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