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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: With Practical Applications ...

George Roberts Perkins - Geometry - 1847 - 308 pages
...in this movement, by the curve DAE, witl have all its points equally distant centre C» from the 8. The radius of a sphere* is a straight line drawn from the centre to any point in, the surface ; the diameter, or axis, is a line passing through this centre, and terminated on both,...

## An Elementary Treatise on Plane and Solid Geometry

Benjamin Peirce - Geometry - 1847 - 150 pages
...generated by the revolution of a semicircle, DAE (fig. 177) about its diameter DE. 417. Definitions. The radius of a sphere is a straight line drawn from the centre to a point in tha Great and Small Circles. Poles. surface ; the diameter or axis is a line passing through...

## Elementary Course of Geometry ...

Charles William Hackley - Geometry - 1847 - 103 pages
...tant from the center O. The sector of a circle AOC at the same time generates a spherical sector. 2. The radius of a sphere is a straight line drawn from the center to any point on the surface. The diameter or axis of a sphere is a straight line drawn through...

## Elements of Geometry and Trigonometry Translated from the French of A.M ...

Charles Davies - Trigonometry - 1849 - 359 pages
...revolving round its diameter DE, describes the sphere; any circular sector, as DCF or FCH, describes a 10. The radius of a sphere is a straight line drawn...centre, and terminated on .both sides by the surface. solid, which is named a spherical sector. All the radii of a sphere are equal; all the diameters are...

## Elements of Geometry and Conic Sections

Elias Loomis - Conic sections - 1849 - 226 pages
...diameter AB, which remains unmoved. 2. The radius of a sphere, i# 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 terminated each way by the surface. 3. It will be shown (Prop. I.), that every section...

## The Elements of Astronomy: Or, The World as it Is, and as it Appears

Anna Cabot Lowell - Astronomy - 1850 - 376 pages
...curved surface, all the points of which are equally distant from a point within called the centre. The radius of a sphere is a straight line drawn from the centre to a point in the surface ; the diameter, or axis, is a line passing through the centre, and terminated...

## Elements of physical geography

Hugo Reid - 1850
...circumference of the circle, passing through the centre to the opposite side. 55. The RADIUS of a circle, or of a sphere, is a straight line drawn from the centre to the surface of the sphere. or circumference of the circle. 56. All radii of the same circle, or same...

## A compendium of modern geography

Alexander Stewart - 1850 - 443 pages
...cireumference of the cirele, passing through the centre to the opposite side. The RADIUS of a cirele, or of a sphere, is a straight line drawn from the centre to the surface of the sphere, or cireumference of the cirele. All radii of the same cirele, or same sphere,...