This section is from the book "Cyclopedia Of Architecture, Carpentry, And Building", by James C. et al. Also available from Amazon: Cyclopedia Of Architecture, Carpentry And Building.
16. To find the lateral surface of a prism: Rule - Multiply the perimeter of the base by the altitude.
17. To find the lateral surface of a regular pyramid: Rule - Multiply the perimeter of the base by one-half the slant height. Fig. 9.
18. To find the lateral surface of the frustrum of a regular pyramid: Rule - Multiply the perimeters of the two ends by one-half the slant height. Fig. 10.
 
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