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Pyramidal FrustumA pyramidal frustum (or truncated pyramid) is a solid which can be created by chopping off the top of a pyramid. The bottom face and the top face of the frustum are in parallel. The sides are trapezoids and meet at a common point. The surface S_{s} of the sides of the truncated pyramid can be calculated as S_{s} = 0.5(p_{b}+p_{t})s, with p_{b} and p_{t} as the perimeters of the bottom and the top face, and s as the slant height. The total surface S is given byS = S_{s} + A_{b} + A_{t} The volumn V of the pyramidal frustum is


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