 | David Steel - 1805 - 392 sider
...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 - 1809 - 220 sider
...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 - 1817 - 298 sider
...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.... | |
 | 1821 - 312 sider
...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 - 1822 - 516 sider
...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 - 1822 - 488 sider
...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... | |
 | John Nicholson (civil engineer.) - 1825 - 1008 sider
...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... | |
 | Abram Robertson - 1825 - 180 sider
...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... | |
 | Edinburgh encyclopaedia - 1830 - 828 sider
...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) - 1830 - 240 sider
...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. 
