Haswell, Charles Haynes, 1809- [from old catalog] · New York, Harper & brothers · leaf 268
4 sq.feet. To Compute tlie Surface of tlie ZFrnstriixii of aCone-Fig. 45. Rule.—Multiply the sum of the perimeters of the two ends by the slant height of the frustrum; halve the product, and add it to the areas of the two ends. -p- a* n c + cxh ... r Fig. 45. Or, - J- a -j-a = surface. a… … 58.119: X 7854 = 58.119 :r 548.349 inches. PYRAMIDS. areas of ends. . Then 490.23 -f- Definitiok.—A figure the base of which has three or more sides, and the sides ofwhich are plain triangles. To Compute th.e Surface of a Pyramid-Figs. 46and. 4*7. Rule.—Multiply the perimeter of the base by the…
Engineering · Mechanical engineering
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