 | William Hawney - Arithmetic - 1751 - 370 pages
...2fr fr Cylinder, = ; that is, = =r 3 3X2 3 63. Wherefore r S == rf, that is, dividing by r, S — C; or the Surface of the Sphere is equal to the curve...Sphere or Cylinder, you muft multiply the Diameter ( — 2 r) by the Circumference of a great Circle of the Sphere, or by the Periphery of the Bafe. From*... | |
 | William Hawney - Arithmetic - 1775 - 372 pages
...of the G#+r.'JL» *J£ ; thtt U, * = ill = -O. Wherefore r S =5 rf, that is, dividing by r, S ~ f ;. or the Surface of the Sphere is equal to the. curve...Cylinder, but the curve Surface of the Cylinder was 2 r c. 3- 3*2 A 6 3 . Wherefore, to find the Area of the Surface of either Sphere or Cylinder, you muft multiply... | |
 | Nathan Scholfield - Conic sections - 1845 - 542 pages
...Hence, as the solidity of a sphere is equal to twothirds that of its circumscribing cylinder, and as the surface of the sphere is equal to the curve surface of the cylinder ; and as the solidities of each of these bodies are equal to the products of their respective surfaces,... | |
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C; or the Surface of the Sphere is equal to the curve Surface of the Cylinder, but the curve Surface of the Cylinder was 2 r c. Wherefore, to find the Area of the Surface of either Sphere or Cylinder, you muft multiply the Diameter ( — 2 r) by the Circumference... 