Exploring Parallel and Perpendicular Lines
Click on Problem 1. Set points A, B, and C to match problem 1. Enter the line parallel to line AB that goes through point C into the appropriate box. Do the same for the perpendicular line to AB through point C. You can enter the line in point-slope form.
When finished, uncheck Problem 1 and move on to problem 2, etc. If your teacher has provided a problem set, use this tool to check your answers.