Books Books
The area of the surface of a sphere is four times the area of a great circle.
Observational Geometry - Page 113
by William Taylor Campbell - 1899 - 240 pages

## Iron: An Illustrated Weekly Journal for Iron and Steel ..., Volume 9

Perry Fairfax Nursey - Industrial arts - 1828 - 410 pages
...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...

## Treatise on Plane and Solid Geometry: For Colleges, Schools and Private ...

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....

## Treatise on Geometry and Trigonometry: For Colleges, Schools and Private ...

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....

## A Treatise on Land Surveying in Theory and Practice ...

John A. Smith - 1869 - 366 pages
...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...

## The popular encyclopedia; or, 'Conversations Lexicon': [ed. by A. Whitelaw ...

Popular encyclopedia - 1885 - 498 pages
...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...

## Practical Work in General Physics for Use in Schools and Colleges

Walter George Woollcombe - Physics - 1894 - 104 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...