 | Ireland commissioners of nat. educ - 1834 - 370 pages
...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 ends. 12. When the axis is perpendicular... | |
 | William Galbraith - Astronomy - 1834 - 454 pages
...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... | |
 | William Grier - Mechanical engineering - 1836 - 384 pages
...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... | |
 | Commissioners of National Education in Ireland - Measurement - 1837 - 290 pages
...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 ends. 11. When the axis is perpendicular... | |
 | A. Bell - Conic sections - 1837 - 180 pages
...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 albout which the semicircle revolves ; and its centre... | |
 | Thomas Holliday - Surveying - 1838 - 404 pages
...parallel to each other, and its sides four trapezoids. 13. A sphere or globe is a solid, generated by the revolution of a semicircle about its diameter, which remains fixed. 14. The diameter of a sphere is any straight line passing through the centre, and terminating in each... | |
 | 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... | |
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The sphere may be conceived to be formed by the revolution of a semicircle about its diameter, which remains fixed. 
