PLEASE HELP I DON'T UNDERSTAND THIS AND THIS IS DUE IN 5 MINUTES!!! On the coordinate plane shown, each grid unit represents 10 feet. Polygon QRST has vertices Q(10, 20), R(−10, 20), S(−10, −10), and T(10, −10), and represents the floor plan of a room. Find the perimeter and area of the room. The perimeter of the room is _ feet. The area of the room is _ square feet.