Slope - Parallel and Perpendicular through Polygon

This investigation is used for Geometry class to teach slope. First, students investigate definition of Parallelogram with two pairs of parallel lines in Quadrilateral. Teacher can link Rise over Run concept to Slope formula. Second, students define perpendicular with two diagonal lines inside the Kite. Students have to plot points and draw their own diagram on coordinate plane with practicing of Coordinate Geometry. In my class, they have to use (y2-y1)/ (x2-x1) for this activity with linking knowledge of Rise over Run