lw + lh + wh x2
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Squared. When you find surface area, you are only finding the area of the shapes that make up the three-denominational shape.
Surface area = 2LW + 2(L+W)H
There is no rectangular prism below 8 8 19.
To find the surface area of an equilateral triangular prism you take the area of the rectangular sides and the triangular bases and add them up and your done.
the Surface area of a Rectangular prism is (2 x Length x Breadth) + (2 x Length x Height) + (2 x Breadth x Height) By austin from Covenant christian school