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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

## Robinson's New Practical Arithmetic for Common Schools and Academies

Horatio Nelson Robinson - Arithmetic - 1892 - 428 pages
...straight line passing through the center of the sphere, and terminated at both ends by its surface. 548. The Radius of a sphere is a straight line drawn from the center to any point in the surface. EXAMPLES. 549. To find the convex surface of a pyramid or cone....

## Robinson's New Practical Arithmetic for Common Schools and Academies

Horatio Nelson Robinson - Arithmetic - 1892 - 430 pages
...straight line passing through the center of the sphere, and terminated at both ends by its surface. 548. The Radius of a sphere is a straight line drawn from the center to any point in the surface. EXAMPLES. 549. To find the convex surface of a regular pyramid...

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

Henry B. Maglathlin - 1894 - 368 pages
...curved surface, all points of which are equally -rx 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...

## Robinson's New Higher Arithmetic: For High Schools, Academies, and ...

Horatio Nelson Robinson - Arithmetic - 1895 - 526 pages
...straight line passing through the center of the sphere, and terminated at both ends by its surface. 920. The Radius of a sphere is a straight line drawn from the center to any point in the surface. Examples. 921. To find the surface of a sphere. 1. Find the surface...

## Solid Geometry, Volumes 6-9

George Albert Wentworth - Geometry, Solid - 1899 - 246 pages
...may be generated by the revolution of a semicircle ACB about its diameter AB as an axis. 739. DEF. 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 passing through the centre and limited by the...

## Plane and Solid Geometry

George Albert Wentworth - Geometry - 1899 - 500 pages
...may be generated by the revolution of a semicircle ACB about its diameter AB as an axis. 739. DBF. 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 passing through the centre and limited by the...

## Observational Geometry

William Taylor Campbell - Geometry - 1899 - 272 pages
...curved, and all parts of it are equally distant from a point within the sphere, which is the centre. 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 bounded at each...

## The Essentials of Geometry

Webster Wells - Geometry - 1899 - 420 pages
...bounded by a surface, all points of which are equally distant from a point within called the centre. A radius of a sphere is a straight line drawn from the centre to the surface. A diameter is a straight line drawn through the centre, having its extremities in the...