| David Steel - 1805
...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 - 177 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 - 253 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 - 4 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 - 494 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
...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 - 1825 - 125 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... | |
| John Nicholson (civil engineer.) - 1825
...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
...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 - 182 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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