 | Benjamin Greenleaf - Arithmetic - 1839 - 356 pages
...surface, every point of which is equally distant from a point within, called the centre. The sphere may be conceived to be formed by the revolution of a semicircle about its diameter, which remains fixed. A hemisphere is half a sphere. 9. The segment of a pyramid, sphere, or any other solid, is a part cut... | |
 | Frederick Augustus Griffiths - 1840 - 436 pages
...; otherwise it ia Oblique. A Sphere is a solid contained under one convex surface, and is described by the revolution of a semicircle about its diameter, which remains fixed. The Centre of the Sphere is such a point within the solid, as is every where equally distant from the... | |
 | Benjamin Greenleaf - Arithmetic - 1841 - 334 pages
...surface, every point of which is equally distant from a point within, called the centre. The sphere may be conceived to be formed by the revolution of a semicircle about its diameter, which remains fiXed. A hemisphere is half a sphere. 9. The segment of a pyramid, sphere, or any other solid, is a part cut... | |
 | Charles Guilford Burnham - Arithmetic - 1841 - 324 pages
...surface, every point of which is equally distant from a point within, called the centre. The sphere may be conceived to be formed by the revolution of a semicircle about its diameter, which remains fixed. A hemisphere is half a sphere. 9. The segment of a pyramid, sphere, or any other solid, is a part cut... | |
 | Andrew Bell - Mathematics - 1842 - 402 pages
...surface is equidistant from a certain point within it. This point is called the centre. A sphere may be conceived to be formed by the revolution of a semicircle about its diameter as. an axis. 318. A line drawn from the centre to the surface of a sphere is called its radius ; and... | |
 | T H. Howe - 1842 - 458 pages
...latitudes. (See also Prob. XVIII., Sect. 1.) A globe or sphere is defined to be " the solid generated by the revolution of a semicircle about its diameter, which remains fixed :" — Thus our skilful skipping friend, under such circumstances, may be said to cut out the surface... | |
 | Arithmetic - 1843 - 142 pages
...at the vorlex, and the base any plane figure, as fig. 14. 37. A sphere or globe is a solid described by the revolution of a semicircle about its diameter, which remains fixed, as fig. 15. 38. A cone is a solid, as the pyramid, but whose base is a circle, as fig. 13. MENSURATION... | |
 | James Robinson (of Boston.) - 1847 - 304 pages
...surface, every point of which is equally distant from a point within, called the centre. The sphere may be conceived to be formed by the revolution of a semicircle about its diameter. The figure ACB represents a sphere. 8. A hemisphere is half a sphere. A segment of a sphere, or of... | |
 | James Wharton - 1847 - 224 pages
...pyramid ; and if the base is a circle, &c., it is called a cone. 6. A sphere is a round solid, which may be conceived to be formed by the revolution of a semicircle about its diameter. 7. A frustum is the part left when the top is cut off. 8. A zone of a sphere is a part intercepted... | |
 | Samuel Hunter Christie - 1847 - 172 pages
...parallel to one another; and the others are parallelograms. 16. A Sphere is a solid figure described by the revolution of a semicircle about its diameter, which remains fixed. 17. The Axis of a sphere is the fixed straight line about which the semicircle revolves. 18. The Centre... | |
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The sphere may be conceived to be formed by the revolution of a semicircle about its diameter, which remains fixed. 
