How to find the surface area of a prism

Wednesday, June 26, 2013

How to find the surface area of a prism

Surface Area of a Prism

First, what is a prism? A prism is a rectangular solid with a length, a width, and a height.

To find the surface area you are trying to figure out the total area of the surface of the prism.

The formula for finding the surface area equals

2* (length *width) + 2(length*height) + 2*(height * width) = Surface area of a prism

Find the surface area of a prism with a length of 6 units, a height of3 units and a width of 4 units.

Step 1. Plug in the appropriate units in the formula

              2* (6*4) + 2(6*3) + 2( 3*4)

                   (L*W)      ( L*H)      (H*W)

Step 2. 2*24 + 2*18 + 2*12

Step 3. 48+36+24 = 108 units squared 

Surface area is always squared



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