What are the three types of "pairs of lines" we could have?
Source: Created by Crystal Kirch using Camtasia for Mac
If I give you a line, you need to be able to find the slope of a line parallel and perpendicular to it. This video will help you do that.
Source: Created by Crystal Kirch using Camtasia for Mac
Now it's time for me to give you TWO lines and have you tell me what you know about them! Are they parallel, perpendicular, or skew?
Source: Created by Crystal Kirch using Camtasia for Mac