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sphere

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sphere

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A sphere is a perfectly round three-dimensional figure. Its radius is the distance from the centre to the surface. When a sphere is cut along a great circle (a circle on the sphere that has the same diameter as the sphere), two hemispheres are produced.

Perfectly round object with all points on its surface the same distance from the centre. This distance is the radius of the sphere. For a sphere of radius r, the volume V = 4/3πr3 and the surface area A = 4πr2.



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? Mentioned in ? References in classic literature
 
That the red sphere had been dug out as a precious thing, was patent.
The Red One by London, Jack View in context
Personally, he now inclines to the opinion of the Sphere that the Straight Lines are in many important respects superior to the Circles.
Flatland by Abbott, Edwin View in context
In his humble sphere he was esteemed an honest man, although like many of his class in English towns he was somewhat addicted to drink.
Present At A Hanging And Other Ghost Stories by Bierce, Ambrose View in context
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