 | A. Bell - Conic sections - 1837 - 180 pages
...triangles ; the fourth by pentagons ; and the fifth by equilateral triangles. 10. A sphere is a solid described by the revolution of a semicircle about its diameter, which remains fixed. The axis of the sphere is the fixed diameter about which the semicircle revolves ; and its centre... | |
 | William Whewell - Calculus - 1838 - 212 pages
...through the centre = — , 2 CD 2 chord through the focus == SCHOLIUM. DEFINITIONS FROM EUCLID, BOOK XI. 1. A sphere is a solid figure described by the revolution of a circle about its diameter, which remains fixed. The axis of the sphere is the fixed straight line about... | |
 | Frederick Augustus Griffiths - 1840 - 436 pages
...pyramid or cone ; 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... | |
 | Euclides - Geometry - 1841 - 378 pages
...that are opposite are equal, similar, and parallel to one another; and the others parallelograms. XIV. A sphere is a solid figure described by the revolution...semicircle about its diameter, which remains unmoved. XV. The axis of a sphere is the fixed straight line about which the semicircle revolves. XVI. The centre... | |
 | John Playfair - Euclid's Elements - 1842 - 332 pages
...whereof every opposite two are parallel. 6. A cube is a solid figure contained by six equal squares. 7. A sphere is a solid figure described by the revolution of a semicircle about a diameter, which remains unmoved. 8. The axis of a sphere is the fixed straight line about which the... | |
 | Euclides - 1842 - 316 pages
...proportional; that is, which are described by similar rectangles, or similar rightangled triangles. X. A sphere is a solid figure described by the revolution of a semicircle about a diameter of the circle, which diameter remains fixed. XI. The axis of a sphere is the fixed straight... | |
 | Samuel Maunder - Encyclopedias and dictionaries - 1843 - 914 pages
...two that are opposite are equal, similar, and parallel to one another; and the others parallelograms. A sphere is a solid figure described by the revolution of a circl.-. A cone is a solid figure described by the revolution ol a right angled triauglc about one... | |
 | Arithmetic - 1843 - 142 pages
...a point 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... | |
 | Euclides - 1845 - 546 pages
...that are opposite are equal, similar, and parallel to one another; and the others parallelograms. XIV. A sphere is a solid figure described by the revolution...semicircle about its diameter, which remains unmoved. XV. The axis of a sphere is the fixed straight line about which the semicircle revolves. XVI. The centre... | |
 | Euclid, James Thomson - Geometry - 1845 - 382 pages
...be rectangular. 16. A cube is a rectangular parallelepiped, which has all its six sides squares. 17. A sphere is a solid figure described by the revolution...semicircle about its diameter, which remains unmoved. 18. The axis of a sphere is the fixed straight line about which the semicircle revolves. 19. The centre... | |
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A sphere is a solid figure described by the revolution of a semicircle about its diameter, which remains unmoved. 
