...which is the vertex of the furface of the cone, is named the -vertex of the cons. 6. XIII. The flraight line drawn from, the vertex to the centre of the circle, is named the axis of the cone. 7. XIV. And the circle itfelf is named the bafe of the cone. 8. XV. Cones...

...called the axis. 4. XI. The figure contained by the circle,"and the surface which is intercepted between the vertex and the circumference of the circle, is...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. Cones which have their axis at...

...ellipse, a parabola, a hyperbola, &c. A circular cone is denominated right cone, when the axis, or line drawn from the vertex to the centre of the circle, is perpendicular to the base. Or, in other words, when all its elements make the same angle with the plane...

...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....

...described by the revolving line is called the base, and the fixed point the vertex, of the cone. Def. 3. The straight line drawn from the vertex to the centre of the base, is called ihe'axis of the cone. Def. 4. When the axis is at right angles to the plane of the...

...surface is called a cone. II. The point is called the vertex, and the circle the base of the cone. The straight line drawn from the vertex to the centre of the circle, is called the axis. If the axis be perpendicular to the plane of the base, the cone is said to be right. III. If the generating...

...surface is called a cone. II. The point is called the vertex, and the circle the base of the cone. The straight line drawn from the vertex to the centre of the circle, is called the axis. If the axis be perpendicular to the plane of the base, the cone is said to be right. III. If the generating...

...surface is called a cone. II. The point is called the vertex, and the circle the base of the cone. The straight line drawn from the vertex to the centre of the circle, is called the axis. If the axis be perpendicular to the plane of the base, the cone is said to be right. III. If the generating...

...circular cone ; and this is the cone usually spoken of as the cone. The right line through the vertex and the centre of the circle is called the axis of the cone. 417. The base of a cone is the plane figure intercepted by its surface on any plane -which cuts entirely...

...cone. The word circular indicates that the directrix is a circle ; and the word right indicates that the straight line drawn from the vertex to the centre of the directrix is at right angles to the plane of the directrix. An oblique circular cone is a cone in which...