| Samuel Webber - 1808
...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. 9. The axis of a solid, is aline drawn from the middle of... | |
| Francis Nichols - 1811 - 128 pagina’s
...round 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... | |
| Ireland commissioners of nat. educ - 1834
...on. 9. A cone is a round pyramid, having a circle for its base. 10. A sphere is a round solid, which **may be conceived to be formed by the revolution of a semi-circle** about its diameter which remains fixed. 11. The axis of a solid is a line joining the middle* o> both... | |
| James L. Connolly (mathematician.) - 1835 - 250 pagina’s
...round solid body, every part of whose surface is equally from a point within it, called the centre; **and it may be conceived to be formed by the revolution of a semicircle round its diameter.** To find its solidity, this is the RULE. Multiply the axis or diameter into the circumfe. rence, and... | |
| William Grier - 1836 - 344 pagina’s
...SECTIONS. DEFINITIONS. A CONE is a solid figure having a circle for its base and terminated in a vertex ; **it may be conceived to be formed by the revolution of a** triangle about one of its sides. Conic Sections are the figures made by a plane cutting a cone. According... | |
| William Grier - 1836 - 344 pagina’s
...SECTIONS. DEFINITIONS. A CONK is a solid figure having a circle for its base and terminated in a vertex ; **it may be conceived to be formed by the revolution of a** triangle about one of its sides. Conic Sections are the figures made by a plane cutting a cone. According... | |
| Commissioners of National Education in Ireland - 1837 - 262 pagina’s
...on. 8. A cone is a round pyramid, having a circle for its base. 9. A sphere is a round solid, which **may be conceived to be formed by the revolution of a semi-circle** about its diameter which remains fixed. 10. The axis of a solid is a line joining the middle of both... | |
| Benjamin Greenleaf - 1839 - 305 pagina’s
...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,... | |
| Benjamin Greenleaf - 1841 - 314 pagina’s
...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,... | |
| Charles Guilford Burnham - 1841 - 312 pagina’s
...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,... | |
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