1. 9.1 – Points, Lines, and Planes
Grade 4

2. Math Vocabulary A point is an exact location in space.
A line is a straight path of points that goes on and on in two directions.
A plane is an endless flat surface.

3. Math Vocabulary – Pairs of Lines
Parallel Lines – never cross and stay the same distance apart.
Intersecting Lines – pass through the same point.
Perpendicular Lines – intersecting lines that form square corners.

4. Practice Name four points: Name four lines:
Name two pairs of parallel lines:
Name two pairs of perpendicular lines:

5. Practice
What geometric term could you use to describe the top and bottom sides of a desk?
What geometric term could you use to describe the tip of your pen?
What geometric term could you use to describe your math textbook?

6. Homework
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