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Objectives: Become familiar with spatial vocabulary Be able to identify points, lines, planes from a given picture. Also, identify intersections of these objects.

A point is simply a location in space.

A point is so small that it does not take up any space (zero volume).

We label points with capital letters.

When you draw a point on your paper, what are you really doing? You are marking off a location in space.

Draw and label a point in the space below:

We know what a line looks like , but in Geometry a line is and infinite row of points.

It has no beginning and no end.

2 points are collinear if they lay on the same line.

Draw a picture of a line, label it “r”, containing 2 collinear points, label them “P and Q”:

A plane is a 2 – dimensional “slice” of space that can contain points and lines.

It is always FLAT.

Draw a picture of a plane and label it “W”: