Unit 9 Contents

2. This is line RT ().

1. What are two other names for this line?
2. Name at least 2 line segments that are part of .

A ray is part of a line. It starts at one point and then goes on forever in only one direction.

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3. This is ray XY. We can write ray XY like this: . A ray is named by its endpoint first, followed by another point on the ray. What is another name for this ray?
4. Name the two rays that make up ∠R below.

Use the figure below to answer Questions 5–11.

5. Name two lines segments in the picture.
6. Name two lines.
7. Name two rays.
8. At what point do you see a right angle?
9. At what point do you see an acute angle?
10. Which two lines meet to make an acute angle?
11. Which two lines meet to make a right angle?