Find the area and perimeter of these rectangles I've never had to find area and perimeter with an algebraic expression, so it'd be nice if someone could explain the steps of how to get the answer and answer my question. Thanks!

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown