 | Charles Hutton - 1788 - 728 σελίδες
...by the revolution of a femicircle about its diameter, which remains fixed. 8. The axis of a folid, is a line drawn from the middle of one end, to the middle of the oppofite end ; as between the oppofite ends of a prifm. Hence the axis of a pyramid, is the line from... | |
 | 1801 - 658 σελίδες
...of which is equally distant from a point within, call- LJL!| ed the centre. The sphere may -jj', be conceived to be formed by the revolution of a semicircle...fixed. 9. The axis of a solid is a line, drawn from the midd« of one end to the middle of the opposite end ; as between the opposite ends of a prism. Hc;nce... | |
 | Thomas Hodson - 1806 - 502 σελίδες
...be formed by the revolution of a femicircle about its diameter. (Fig. 7.) 9. The axis of any folid is a line drawn from the middle of one end to the middle of the oppofite end. Thus the axis of a pyramid is a line drawn from the top, or vertex, to the middle of... | |
 | Samuel Webber - 1808 - 520 σελίδες
...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...diameter, which remains fixed. 9. The axis of a solid, is aline drawn from the middle of one end to the middle of the opposite end ; as between the opposite... | |
 | Francis Nichols - 1811 - 162 σελίδες
...surface, which is every 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... | |
 | Edward Bruce (bookseller.) - 1821 - 418 σελίδες
...globe is a perfectly round body; its middle point is called the centre. A globe, or sphere, is a solid, formed by the revolution of a semicircle about its diameter, which remains fixed. The axis of a sphere is the right line about which the semicircle revolves. 6. A great circle divides... | |
 | Rev. John Allen - 1822 - 516 σελίδες
...sphere, is a right line drawn from the centre to any part of its surface. 16. When a sphere is supposed to be formed by the revolution of a semicircle about its diameter, which remains unmoved, the diameter, about which the semicircle revolves, is called, the axis of the sphere. 17.... | |
 | William Galbraith - 1827 - 412 σελίδες
...angles alone ; while that of a spherical triangle always can. 3. A sphere or globe is a round body formed by the revolution of a semicircle about its diameter, which remains fixed. 4. The centre of the sphere is the same with that of the revolving semicircle. 5. The axis of the sphere... | |
 | John Bonnycastle - 1829 - 256 σελίδες
...quadrangular pyramid; when a pentagon, it is called a pentagonal pyramid, &c. 8. A sphere is a solid described by the revolution of a semicircle about its diameter, which remains fixed. 9. The centre of a sphere is a point within the figure, every where equally distant from the convex surface... | |
 | William Grier - 1832 - 366 σελίδες
...revolution of some curve round its base. 7. The axis of a solid is a straight line drawn through the solid, from the middle of one end to the middle of the opposite end. 8. The height of a solid is a line drawn from the vertex perpendicular to the base, or the plane on... | |
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The sphere may be conceived to be formed by the revolution of a semicircle about its diameter, which remains fixed. 
