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The radius of a sphere is a straight line drawn from the centre to any point of the surface ; the diameter or axis is a line passing through this centre, and terminated on both sides by the surface.
Elements of Geometry and Trigonometry - Page 168
by Adrien Marie Legendre - 1837 - 359 pages

## Mensuration for Beginners: With Numerous Examples

Isaac Todhunter - Measurement - 1869 - 296 pages
...every point of its surface equally distant from a certain point, called the centre of the sphere. A radius of a sphere is a straight line drawn from the centre to the surface. A diameter of a sphere is a straight line drawn through the centre, and terminated both...

## New Practical Arithmetic in which the Science and Its Applications are ...

Henry Bartlett Maglathlin - Arithmetic - 1869 - 324 pages
...curved surface, all points of which are equally distant from a point within called the center. 429. The RADIUS of a sphere is a straight line drawn from the center to any point in the surface. 430. The DIAMETER of a sphere is a straight line drawn through...

## Elements of Geometry, Plane and Spherical: With Numerous Practical Problems

Horatio Nelson Robinson - 1869
...it is that portion of the sphere which is generated by a sector of the 'generating semicircle. 21. The Radius of a Sphere is a straight line drawn from the center to any point in the surface; and the diameter is a straight line drawn through the center, and...

## A New Manual of the Elements of Astronomy: Descriptive and Mathematical ...

Henry Kiddle - Astronomy - 1870 - 284 pages
...centron, the centre. through the centre, and terminated both ways by the surface of the sphere. 33. The RADIUS of a sphere is a straight line drawn from the centre to any point of the surface. 34. Circles drawn on the surface of a sphere are either GREAT CIRCLES or SMALL CIRCLES. 35. GREAT CIRCLES...

## Elements of Geometry, Conic Sections, and Plane Trigonometry

Elias Loomis - Geometry - 1871 - 58 pages
...described by the revolution of a semicircle A.DB, about its diameter AB, which remains unmoved. 2. The radius of a sphere, is a straight line drawn from the center to any point of the surface. The diameter, or axis, is a line passing through the center, and...

## Elements of Geometry and Trigonometry from the Works of A.M. Legendre ...

Charles Davies - Geometry - 1872 - 455 pages
...from a point within, called the centre. The bounding line is called the circumference. 2. A RADIUS is a straight line drawn from the centre to any point of the circumference. 3. A DIAMETER is a straight line drawn through the centre and terminating in the circumference....

## A Mathematical Geography: With a Supplement Containing an Outline of ...

Edward Payson Jackson - Astronomical geography - 1872 - 138 pages
...24 t The Diameter of a Sphere is a straight line drawn from the center both ways to the surface. 25. The Radius of a Sphere is a straight line drawn from the center to the surface. 26. Great Circles of a Sphere are circumferences of the sphere. (See § 14.)...

## A Short Course in Astronomy: And the Use of the Globes

Henry Kiddle - Astronomy - 1870 - 190 pages
...straight line Hrawn through the centre, and terminated both ways by the surface of the sphere. 32. Tlie Radius of a sphere is a straight line drawn from the centre to any point of the surface. 33. Circles drawn on the surface of a sphere are either Great Circles or Small Circles. 34. Great Circles...