 | Perry Fairfax Nursey - 1828 - 410 pàgines
...Fluent», aie MECHANICAL CHIMNEY-SWEEPING. 4 с г* = 4 (¡mes 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... | |
 | Scottish school-book assoc - 1845 - 444 pàgines
...hence the whole surface of a sphere is the square of the diameter multiplied into 3' 1 4 1 6, which is four times the area of a great circle of the sphere, or of a circle having the same diameter as the sphere. NOTE II. The surface of a hemisphere is twice... | |
 | Eli Todd Tappan - 1864 - 288 pàgines
...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 - 1868 - 444 pàgines
...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 - 368 pàgines
...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... | |
 | Eli Todd Tappan - 1873 - 288 pàgines
...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.... | |
 | Popular encyclopedia - 1885 - 498 pàgines
...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 - 1894 - 104 pàgines
...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 - 1898 - 424 pàgines
...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 pàgines
...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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The area of the surface of a sphere is four times the area of a great circle. 
