| Perry Fairfax Nursey - Industrial arts - 1828
...Fluent», aie MECHANICAL CHIMNEY-SWEEPING. 4 с г* = 4 (ˇmes the area of the great circle AP B. And henee **the surface of a sphere is four times the area of a** circle of the same radius. Sup4 с т3 pose from the expression — — it is required to find the... | |
| Eli Todd Tappan - Geometry, Modern - 1864 - 292 pages
...is equal to the product of the diameter by the circumference of a great circle. 787. Corollary — **The area of the surface of a sphere is four times the area of a great circle.** For the area of a circle is equal to the product of its circumference by one-fourth of the diameter.... | |
| Eli Todd Tappan - Geometry - 1868 - 436 pages
...is equal to the product of the diameter by the circumference of a great circle. 787. Corollary. — **The area of the surface of a sphere is four times the area of a great circle.** For the area of a circle is equal to the product of its circumference by one-fourth of the diameter.... | |
| John A. Smith - 1869
...fourth part of the surface of a sphere ; but TT r is the area of a great circle, and hence the area **of a sphere is four times the area of a great circle.** And from the formula we have A = -YCTT-I e being expressed in degrees. 180 Let the diameter of the... | |
| Popular encyclopedia - 1885
...circumference of a circle in terms of the diameter, and r is the radius of the sphere; that is. the area **of a sphere is four times the area of a great circle.** If a spherical surface be cut into rings by a set of parallel planes, the area of any ring is proportional... | |
| Walter George Woollcombe - Physics - 1894 - 83 pages
...area of the surface of a hemisphere is twice that of the circular base on which it rests. Therefore **the area of the surface of a sphere is four times the area of a** central section, or 4irr 2 sq. cm. if the radius of the sphere is r cm. Measure the diameter of the... | |
| George Albert Wentworth - Arithmetic - 1898 - 424 pages
...sphere, having its ends in the surface, is called a diameter ; half a diameter is called a radius. 149. **The area of the surface of a sphere is four times the area of a** circle of the same diameter. Hence, To Find the Area of the Surface of a Sphere, Multiply the square... | |
| George Albert Wentworth - Arithmetic - 1898 - 424 pages
...sphere, having its ends in the surface, is called a diameter ; half a diameter is called a radius. 149. **The area of the surface of a sphere is four times the area of a** circle of the same diameter. Hence, To Find the Area of the Surface of a Sphere, Multiply the square... | |
| George Albert Wentworth - 1898 - 424 pages
...sphere, having its ends in the surface, is called a diameter ; half a diameter is called a radius. 149. **The area of the surface of a sphere is four times the area of a** circle of the same diameter. Hence, To Find the Area of the Surface of a Sphere, Multiply the square... | |
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