 | Henry Smith Carhart, Horatio Nelson Chute - Physics - 1917 - 572 pages
...area of a circle is the product of 3.1416 (very nearly if) and the square of the radius (A = irr 2) ; the surface of a sphere is four times the area of a circle through its center (A = 4irr2). For other surfaces, see Appendix III. FIGURE 11. — • SQUARE... | |
 | Nels Johann Lennes, Frances Jenkins - Arithmetic - 1920 - 360 pages
...area of the circle. In geometry, very much more accurate methods than this are used. The result is : The surface of a sphere is four times the area of a circle of the same radius. Since the area of a circle is irr2, it follows that the surface of a sphere... | |
 | William Henry Snyder - Science - 1925 - 648 pages
...of a circle is the product of 3.1416 (very nearly *,«•) and the square of the radius (A = irr)2; the surface of a sphere is four times the area of a circle through its center (A = 4 irr»). SQUARE CENTIMETER AND SQUARE INCH 1 2 3 4 9 e 7 8 • I "1... | |
 | David Eugene Smith, William David Reeve - Mathematics - 1927 - 432 pages
...The distance traveled by a moving body is the product of the rate (or 13. (peed) and the time. 14. The area of the surface of a sphere is four times the product of r and 14. the square of the radius. The reverse test, the recognition of the meaning of... | |
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The area of the surface of a sphere is four times the area of a great circle. 
