# Points, lines, line segments, and rays

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##### Intros

###### Lessons

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##### Examples

###### Lessons

**Identifying lines, line segments, and rays**

Name the figure that is made by points $A$ and $B$ as either: a line, a line segment, or a ray.**Proper notation for lines, line segments and rays**

Use proper notation (with letters and symbols) to name the figure**Drawing lines, line segments and rays**

Draw the figure:**Combinations of lines, line segments and rays**

Name all the lines, line segments, and/or rays in the picture. Use proper notation.**Intersecting lines, line segments and rays**

Connect the dots to draw the figures as indicated. Will the figure intersect? Yes or No.

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###### Topic Notes

In this lesson, we will learn:

__Notes:__**Points, Lines, Line Segments**and**Rays**are**basic figures**in math that can be used to construct more complicated figures (i.e. angles, shapes, parallel/perpendicular lines, etc.)

- A
is a dot with position but no size nor shape (undefined) $\,$__point__ - There are an infinite number of points in figures (i.e. you can draw many points between endpoints in a line segment) $\,$
- The proper
**notation**of a point is just to write the named letter (ex. point $A$)

- A
has no beginning/end; an ongoing straight path of points__line__ - The
*arrows*on both sides mean that it can extend infinitely in that direction - The proper
**notation**of a line is to write the letters of two points in the figure and draw a double-sided arrow above the letters (ex. line $\overleftrightarrow{AB}$) - A
is a part of a line with two finite endpoints__line segment__ - A
**line**has*arrows*on both ends whereas the**line segment**has endpoints on both ends; the line continues forever, where the line segment ends where it is drawn - The proper
**notation**of a line segment is to write the letters of the two endpoints and draw a bar above the letters (ex. line segment $\overline{AB}$) - A
starts at one endpoint and extends in one direction__ray__ - One end of the ray has a point, whereas the other end of the ray has an
*arrow* - The proper
**notation**of a ray is to write the letters of two points in the figure (starting with the letter of the endpoint) and draw a one-sided arrow above the letters (ex. ray $\overrightarrow{AB}$ )

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