A line can be extended in both directions.
Draw a figure by extending the three lines in both directions.
Observe the figure; the line I intersects the line m and n.
Yes, the line l intersects the line m and n.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"line](\"/userfiles/image/Library/Geometry/line_l_intersects_the_line_m_and_n.gif\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")