# Investigating Parallel and Perpendicular Lines

- Author:
- Namirah Fatmanissa, MsGomezMath, D. Kirk

## Investigating Parallel and Perpendicular Lines: Instruction

Explore how two parallel lines look like. Investigate the relationship between the slopes of the two lines by changing the slope of the pink line and see how the slope of the blue line changes.
Explore how two perpendicular lines look like. Investigate the relationship between the slopes of the two lines by changing the slope of the pink line and see how the slope of the green line changes.

## Parallel Lines

1. How do you describe the two parallel lines? 2. How are the slopes of the two lines related?

## Perpendicular Lines

1. How do you describe the two perpendicular lines? 2. How are the slopes of the two lines related?

## Check point

If the slope of a line is 2. What is the slope of a line that is a. parallel to it? b. perpendicular to it?