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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

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

Adrien Marie Legendre - Geometry - 1874 - 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. 8. A DIAMETER is a straight line drawn through the centre and terminating in the circumference....

## The Complete Arithmetic, Oral and Written: Second Part

Daniel W. Fish - Arithmetic - 1874 - 272 pages
...straight line passing through the center of the sphere, and terminated at both ends by its surface. 931. The Radius of a sphere is a straight line drawn from the center to any point in the surface. 932. To find the surface of a sphere. 1. Find the surface of a...

## New Elementary Geometry with Practical Applications

Benjamin Greenleaf - Geometry - 1874 - 206 pages
...be formed by the revolution of a semicircle, DAE, about its diameter, DE, which remains fixed. 329. The Radius of a sphere is a straight line drawn from the center to any point in the surface, as the line C B. BOOK VI. Hence, all the radii of a sphere are...

## The Progressive Higher Arithmetic: For Schools, Academies, and Mercantile ...

Horatio Nelson Robinson - Arithmetic - 1875 - 456 pages
...straight line passing through the center of the sphere, and terminated at both ends by its surface. 774. The Radius of a sphere is a straight line drawn from the center to any point in the surface. PROBLEMS. 775. To find the convex surface of a pyramid or cone....

## The Progressive Higher Arithmetic: For Schools, Academies, and Mercantile ...

Horatio Nelson Robinson - Arithmetic - 1875 - 456 pages
...straight line passing through the center of the sphere, and terminated at both ends by its surface. 774. The Radius of a sphere is a straight line drawn from the center to any point in the surface. PROBLEMS. 775. To find the convex surface of a pyramid or cone....

## Hand-book of the Terrestrial Globe, Or, Guide to Fitz's New Method of ...

Ellen Eliza Fitz - Globes - 1876 - 120 pages
...centre. A sphere may be formed or generated by the revolution of a semicircle about its diameter. 14. The radius of a sphere is a straight line drawn from the centre to any part of the surface. 15. The diameter of a sphere is a straight line passing through the centre, and...

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

Elias Loomis - Geometry - 1877 - 458 pages
...described by the revolution of a semicircle ADB about its diameter AB, which remains unmoved. 2. A radius of a sphere is a straight line drawn from the centre to any point of the surface. A diameter is any straight line drawn through the centre, and terminated each way by the surface. All...

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

Henry Kiddle - Astronomy - 1877 - 296 pages
...Fig. 14. through the centre, and terminated both ways by the surface of the sphere. 33. The EADIUS 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. GBEAT CIRCLES...