A square garden is 12 feet long on each side. Janet needs to put a post at each corner. She also needs to put one every 3 feet on each side. How many posts does Janet need.
12ft = 4 posts 4 x 4 =16 - 4 = 12 There is 4 post on each side but there is an overlap so you must take off 4 so there is no overlap Therefore there are 12 posts
