## 5.1 Some Questions

Here are some questions we will address.

How do we describe a line in 2 dimensions or a line or plane in 3?

How can you find a point on a line or in a plane?

The distance between a point and a plane, or a point and a line?

The distance between two skew lines in 3D space?

The distance between parallel lines?

The projection of a point onto a line or plane?

All of these can be answered by appropriate definition and manipulation of
vectors.