"surface measure" . "surface area of the cylinder" . . "total area" . . . "footprint" . "Area" . . . "surface-area" . "surface area of the sphere" . . "footprints" . . "4\u03C0" . "Surface Area" . "Surface area" . "Surface" . "Theory of surface area" . "surface" . . "area" . "Land Area" . "Surface area" . . "surface area" . "bulb size" .