1. Lines
Unit th Grade

2. Line
A line goes on and on in both directions. A line is drawn with an arrow on each end

3. This is called a point!
When it’s at the end of a line it is called an endpoint!

4. Line Segment
A line segment is a part of a line. It is drawn with two endpoints.

5. Ray
A ray goes on and on in one direction. It is drawn with an arrow on one end and an endpoint on the other.

6. Line Relationships

7. Parallel Lines
Parallel lines are always the same distance apart. They will never touch.

8. Can you find the parallel lines?

9. Intersecting Lines
Intersecting lines are two lines that cross each other
“Friends”

10. Can you find the intersecting lines?

11. Perpendicular Lines 90
Perpendicular lines are two lines that intersect to form right angles.

12. Can you find the perpendicular lines?

13. Perpendicular lines are also intersecting lines because they cross each other.
Perpendicular lines are a special kind of intersecting lines because they always form “perfect” right angles. 90

14. Name each figure
Point
Line
Ray
Line Segment
Perpendicular or intersecting
Intersecting
Parallel

15. Well Done!