Now we need to construct a line parallel to another line and we always do this through a point. Once we prove to ourselves how to do it one time, we can just recreate our steps using a new tool!

Use the tools in the applet below to construct a parallel line to AB through C, there are actually multiple ways to do this! Remember that parallel lines are perpendicular to a third line, if you think back to our definitions of parallel.[br][br]See what you can figure out on your own but if you need help watch the video below for help.