Take a sheet of paper. Make two folds (and crease them).to represent intersecting lines and discuss. Can more than two lines intersect in one point?

Name: Two pairs of intersecting lines.

Prove by contradition that two lines in a plane cannot intersect in more than one point.

5.20, AC and BE intersect at P. AC and BC intersect at C. AC and EC intersect at C. Try to find another ten pairs of intersecting line segments. Should any two lines or line segments necessarily intersect? Can you find two pairs of non-intersecting line segments in the figure? Can two lines intersect in more than one point? Think about it.

Two intersecting lines can intersect each other at more than one point.

Two distinct intersecting lines can be parallel to the same line .

How many points can be two distinct lines intersect at the most?

What is the shortest distance between two intersecting lines?

Two distinct intersecting lines cannot be parallel to the same line.

Prove that a st. line cannot cut a circle in more than two points.