How do you find the surface area of prisms? - Answers

firrst u need to find the perimeter of the bases...length of one side by the number of sides...then multiply it by the heigt :) * * * * * That is just so not correct. The periimeter has absolutely nothing to do with the area. A prism consists of two parallel bases which are n-sided polygons and n rectangular faces which need not be of the same size. Step 1. Calculate the area of the base and multiply by 2. Step 2. Calculate the area of each of the rectangular faces. If the bases are regular polygons, then the rectangular faces will all be the same and you can simply multiply the area of one of the faces by n. Step 3. Add together the answers from Step 1 and Step 2.