Line Segments

Part 1

200

Draw a line segment and show the start and end points

What is a line segment? Look at board.

400

·       A ray has one endpoint and goes in one direction. Draw a ray and explain how it is different from a line segment.

Key Differences:

• A ray only has one endpoint and keeps going.
• A line segment has two endpoints and has a fixed length.

600

Draw a figure that includes one line segment, one ray, and one angle. Label and explain each part.

    B

    |

    |\

    | \

    |  \

    |   \

    |    \

    |     \

    A------C

Simple Labels and Explanations:

1. Line Segment: AC – a straight line with two ends (A and C).
2. Ray: AB → – starts at A and goes forever toward B.
3. Angle: ∠CAB – made when two lines meet at A.
4. 
   
   • Vertex: A
   • Arms: AC and AB

Part 2

200

Is this a line segment? Explain your answer 

Look at board.

400

·       Two lines meet at one point. What is formed? Draw it and name it.

A Vertex/ Angle

600

·       A student says, “A line segment can go on forever.” Is this correct? Explain why or why not using a drawing.

❌ The student is not correct.

• A line segment has two endpoints, so it does NOT go on forever.
• Only a line or a ray can extend infinitely.