I'm really stuck on step number one. I know how to find the midpoint of a segment, but the problem does not give me the actual points to plug into the midpoint formula, and I'm lost as to how to find them. Do I use the ruler to find the points? Or should I draw a coordinate plane on a separate piece of paper, trace the triangle on it, then find the points?

Here is my problem:

The thing is if I draw a coordinate plane and trace the triangle, how will I know which quadrant the triangle will go in? And if I use the ruler method, how will that give me my points? The rest of the steps are simple; they are just asking me to fold the paper and draw the perpendicular lines. It is just step one (finding the points to plug into the midpoint formula) that I am having a difficult time with . I would really appreciate it if someone showed me how to do step one.