Th vertices of a sandbox are p (12, 14), Q (12, 17), R (16, 17) and S (16, 14). the coordinates are measured in feet. What is the perimeter of the sandbox?

12,14 to 12,17 is a rise of 3 (14 to 17).

12,14 to 16,14 is a move to the right of 4 (12 to 16)

That means the dimensions of the sandbox are 3ft by 4ft and the perimeter is 2 (l+w) or in this case 2 (3+4) or 14 ft