Afence is being built to go around a play area for young children. the builder
plans to use 138 feet of fencing material to build the fence. he must follow these
directions when putting up the fence:
• the play area must be rectangular.
• the width of the fence must be shorter than the length by 10 feet or less.
• the length and width, in feet, must be whole numbers.
list all the possible lengths and widths for the fenced-in, rectangular areas.
explain how you found your answers.