What is the surface area of this prism if a 12 inches b 6 inches and c 4 inches. Can you picture in your mind how the squares can fold up to make a cube. Lets build our equation for surface area of a rectangular prism starting with our formula.
The surface area formula for a rectangular box is 2 x height x width width x length height x length as seen in the figure below.
S slant height. Surface Area 2lb bhlh 2 l b b h l h The unit of measurement of the area of the rectangular prism is square units. This geometry video tutorial explains how to find the volume of a rectangular prism as well as how to find the surface area of a rectangular prism and its di. S tot total surface area.