Randy is fencing off a semi-circular region in his backyard against a wall. The semi-circular region has a diameter of 24 feet. The fencing will go along the arc only. How much fencing does Randy need? Plz help

There isn’t much to describe when there aren’t points assigned to lmn, but being that it is rotated around the origin 180 degrees, two of the points of l'm'n' would be further form their original position, and the other would be relatively closer. : ))