Greg has a company that manufactures rectangular sheds. The sheds are made with aluminum panels that measure 8 feet, 10 feet, 12 feet or 15 feet along the bottom edge. For example, one possible shed measures 10 feet by 10 feet, another 12 feet by 15 feet and a third measures 15 feet by 12 feet. List the measurements of all the possible sheds Greg’s company can make.