 | John Playfair - Mathematics - 1806 - 320 pages
...every opposite two are parallel. VI. A cube is a solid figure contained by six equal squares. > VII. A sphere is a solid figure described by the revolution of a semicircle about a diameter, which remains unmoved. ; VIII. The axis of a sphere is the fixed straight line about which... | |
 | Robert Simson - Trigonometry - 1806 - 546 pages
...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 of a semici rcle about its diameter, which remains unmoved. XV. The axis of a sphere is the fixed straight... | |
 | William Nicholson - 1809 - 752 pages
...is equally distant from a point within called its centre. Euclid defines Ihr globe or sphere, to bè a solid figure described by the revolution of a semi-circle about its diameter, which remains unmoved. Also, its axis is the fixed line or diameter about which the semi-circle revolves ; and its centre... | |
 | William Nicholson - Natural history - 1809 - 700 pages
...is equally distant from a point within called its centre. Euclid defines the globe or sphere, to be a solid figure described by the revolution of a semi-circle about its diameter, which remains unmoved. Also, its axis is the fixed line or diameter abeut which the semi-circle revolves ; and its centre... | |
 | Francis Nichols - Plane trigonometry - 1811 - 162 pages
...where equally distant from a point within it called the centre. A sphere may be conceived to be formed by the revolution of a semicircle about its diameter, which remains unmoved, and is called the axis of the sphere. 2. A diameter of a sphere is a straight line passing through... | |
 | Euclides - 1814 - 560 pages
...that are opposite arc 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... | |
 | Euclides - 1816 - 588 pages
...are opposite are equaj, 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.... | |
 | William Nicholson - Natural history - 1819 - 394 pages
...is equally distant from a point within, called its centre. Euclid defines the globe or sphere, to be a solid figure described by the revolution of a semi-circle about its diameter, which remains unmoved. Also, its axis is the fixed line or diameter about which the semi-circle revolves ; and its centre... | |
 | John Playfair - Circle-squaring - 1819 - 350 pages
...every opposite two are parallel. XI. A cube is a solid figure contained by. six. equal square*. VII. A sphere is a solid figure described by the revolution of a semicircle about a diameter, which remains unmoved. VIII. The axis of a sphere is the fixed straight line about which... | |
 | William Jillard Hort - 1822 - 308 pages
...circle. The truth of this proposition is evident from the definition which geometry gives of a sphere. A sphere is a solid figure, described by the revolution of a demi-circle about a diameter. Definitions. - 1. Any circle, which is a section of a sphere, by a plane... | |
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A sphere is a solid figure described by the revolution of a semicircle about its diameter, which remains unmoved. 
