A. The area of a sign shall be measured by enclosing the shape in the simplest regularly shaped geometric figure, such as a circle, triangle, diamond, square, rectangle, or other figure having not more than six sides. Where one or more messages consist of letters, panels, or symbols attached to a surface, then the sign area shall be the sum of the areas of each message. The area of a sphere shall be computed as 50 percent of its surface.

B. The area of a multi-sided sign shall be the total of each exposed sign face, except where signs are parallel back-to-back and attached to opposite sides of a supporting structure. The area of a motor fuel price sign shall be the total of each exposed face, regardless of the orientation of each face.

C. The overall height and clear height of a sign shall be measured from the top of the curb of the nearest street.