 | David Steel - 1805 - 392 pages
...With respect to a triangular pyramid, it is obvious, that its centre of gravity will be found in a straight line drawn from the vertex to the centre of the base. For, supposing the pyramid to be divided into elementary slices, parallel to the base, the centres... | |
 | Robert Simson - Conic sections - 1809 - 220 pages
...fixed point, which is the vertex of the surface of the cone, is named the vertex of the cone, 6. XIII. The straight line drawn from the vertex to the centre of the circle, Is called the axis of the 7. XIV. And the circle itself is named the base of the con?. 8. XV.... | |
 | Robert Simson - Conic sections - 1817 - 298 pages
...fixed point, which is the vertex of the surface of the cone, is named the vertex of the cone. 6 . XIII. The straight line drawn from the vertex to the centre of the circle, is called the axis of the cone. 7. XIV. And the circle itself is named the base of the cone.... | |
 | Mathematics - 1821 - 312 pages
...of. one side and the perpendicular is the greatest possible when their included angle is bisected by the straight line drawn from the vertex to the centre of the circumscribing circle. Required a demonstration by the Elements of Euclid. By the Proposer, and Mn.... | |
 | Rev. John Allen - Astronomy - 1822 - 516 pages
...called t\\cvertex of the cone. 19. The circle is called the base of the cone. 20. A right line, joining the vertex to the centre of the base, is called the axis of the cone. 21. The curve surface, intercepted between the circumference of the base and the vertex, is called,... | |
 | John Imison - Art - 1822 - 488 pages
...is regular or irregular. A pyramid is also right or upright, or it is oblique. It is right, when a line drawn from the vertex to the centre of the base, is perpendicular to it, as Fig. 25. ; and oblique, when this line inclines, as Fig. 26. 46. A cylinder... | |
 | Abram Robertson - Conic sections - 1825 - 180 pages
...base is called a Side of the Cone. 7. A straight line VC, drawn through the vertex of the cone and the centre of the base, is called the Axis of the Cone. 8. If the axis of the cone be perpendicular to the base, it is called a Right Cone. 9. If the axis... | |
 | John Nicholson (civil engineer.) - Great Britain - 1825 - 1008 pages
...regular or irregular. 59- A pyramid is also right or upright, or it is oblique. It is right, when a line drawn from the vertex to the centre of the base, is perpendicular to it, as fig. 25 ; and oblique, when this line inclines, as Fig. 26. 60. A cylinder... | |
 | Edinburgh encyclopaedia - 1830 - 828 pages
...cone to à point in the circumference of the base is called a Side of the Cone. 5. A straighl line VC drawn from the vertex to the centre of the base, is called the Axis of the Cone. COR. Any section of a cone Ihrough the axis is a triaftgle. PROP. I. If л cone be cut by a plane parallel... | |
 | John Nicholson (Civil engineer) - Building - 1830 - 240 pages
...regular or irregular. 59- A pyramid is also right or upright, or it is oblique. It is right, when a line drawn from the vertex to the centre of the base, is perpendicular to it, as Fig. 25 ; and oblique, when this line inclines, as Fig. 26. 60. A cylinder... | |
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The straight line joining the vertex and the centre of the base is called the axis of the cone. 
