Perimeter of a figure can be defined as the
AB+BC+CD+DE+EF+FG+GH+HI+IJ+JK+KL+LM+MN+NO+OP+PQ+QR+RS+SA
Perimeter is the measure of the distance of the boundary of a planar object. It is also defined as the total sum of lengths of all the bounding sides of a planar object.