What is the difference between a line and a line segment?

Compare the two line segments $PQ$ and $RS$ using a divider.

Verify that:

$\overline{AE}=\overline{AB}+\overline{BC}+\overline{CD}+\overline{DE}$

How many lines can pass through one given point?

How many lines can pass through two given points?

Name the points which are in the exterior of the closed figure.

Name the points which are in the interior of the closed figure.

Name the points which are on the boundary of the closed figure.

Name the given line in three different ways.