Online geometry calculator to calculate octogonal prism area, volume and surface area. The number of lateral faces are equal to the number of sides in the base. The lateral faces in a prism are perpendicular to the polygonal bases. Surface area of a prism is the sum of the area of the 2 polygonal bases and the area of the lateral faces. The surface area of a prism is measured in terms of square units. Jun 09, 2014 · How to find the surface area of an octagonal prism Use the formula 2 times base area + Lateral area Step 1. In order to find the base area you will need to find the apothem using the central angle ... Net for prisms explore the concept of surface area by folding the nets of rectangular prisms into 3 dimensional solids each of the four nets included have the s rectangular prism net worksheet. Net for prisms net of octagonal prism triangular prism net surface area . Apr 24, 2017 · Multiply the surface area of the hexagon-shaped side by two, because there are two hexagon-shaped sides on a hexagonal prism. For example, if the surface area of one of those sides was 92 square inches, the total surface area of the two hexagon-shaped sides would be 184 square inches.