A surface area would be vital for determining volume
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Assume that a = apothem length of the triangular prism, b = base length of the triangular prism, and h = height of the triangular prism. The formulas to find the surface area is SA = ab + 3bh.
Surface area is squared; volume is cubed.
2*area of triangular base + perimeter of triangle*length of prism.
It depends on the size of the triangular prism, but depending on the side of the prism you use the triangle area formula to find it or the rectangle area formula to find it.
The two nets of a regular right triangular prism are surface area and volume.