GP - Lesson: Segments and Rays (RC)

Segments and Rays

​Objective: Visualize, construct, and name line segments and rays.

​Line Segment: part of a line that has two  endpoints and all the points  in between.

​A

​B

• Has a beginning and end (finite)

• Each end has an endpoint (see below)

• Names with its endpoint and the order does not matter

​AB

​BA

Multiple Choice

Which of the following best describes a line segment?

• A part of a line with two endpoints

• A line that extends infinitely in both directions

• A line with only one endpoint

• A closed figure with three sides

​A

​B

​A

​B

Math Response

How many line segments can be identified in the line shown?

Type answer here

Correct Answer: 6

Deg^°

Rad

​How many line segments can be identified in the line shown?

​AB, AC, AD, BC, BD, CD

​6 -

​A

​B

• Has a beginning but NO END

• When naming, the ORDER MATTERS

• Name with its endpoint first and the second point it passes through.

​Ray: part of a line that has one endpoint and extends to infinity at the other.

​P

​Q

​R

​or

Multiple Select

Which of the following are true about rays?

• A ray has one endpoint.

• A ray extends infinitely in one direction.

• The order of letters matters when naming a ray.

• A ray has two endpoints.

Multiple Select

Choose all the correct ways to name the ray pictured.

• $$\overrightarrow{ED}$$

• $$\overrightarrow{EC}$$

• $$\overrightarrow{CD}$$

• $$\overrightarrow{DE}$$

• $$\overrightarrow{EDC}$$

​A

​B

​Opposite Rays: two rays that share an endpoint and create a line.

​C

​and

​are OPPOSITE RAYS

Multiple Select

What rays make the line below.

• $$\overrightarrow{RS}$$

• $$\overrightarrow{RT}$$

• $$\overrightarrow{SR}$$

• $$\overrightarrow{TR}$$

• $$\overrightarrow{TS}$$

​D

​E

​Colinear: points that lie on the same line.

​F

​A

​B

​C

​Points A, B, and C
are non-colinear

​Points D, E, and F
are colinear

Multiple Choice

Points G, D, and H are colinear.

• TRUE

• FALSE

Multiple Choice

Name a point colinear with points R and P.

• M

• O

• S

• Q

• N

Open Ended

What is one thing you learned today about line segments and rays that you found interesting or surprising?