...41. A prismoid is a solid similar to the frustum of a pyramid, but its bases are disproportional. 42. The axis of a solid, is a line drawn from the middle...opposite end; as between the opposite ends of a prism. 43. The height, or altitude of a solid, is a line drawn from its vertex, or top, perpendicular to its...

...surface is equidistant from a certain point within it. This point is called the centre. A sphere may be conceived to be formed by the revolution of a semicircle about its diameter as. an axis. 318. A line drawn from the centre to the surface of a sphere is called its radius ; and...

...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...

...latitudes. (See also Prob. XVIII., Sect. 1.) A globe or sphere is defined to be " the solid generated by the revolution of a semicircle about its diameter, which remains fixed :" — Thus our skilful skipping friend, under such circumstances, may be said to cut out the surface...

...at the vorlex, and the base any plane figure, as fig. 14. 37. A sphere or globe is a solid described by the revolution of a semicircle about its diameter, which remains fixed, as fig. 15. 38. A cone is a solid, as the pyramid, but whose base is a circle, as fig. 13. MENSURATION...

...planes, is a solid polyedron, or iimply, a polyedron, further respecting which, see Sundry Tables. 50. The axis of a. solid is a line drawn from the middle...opposite end ; as between the opposite ends of a prism. 51. The height at altitude of a solid is a line drawn from its vertex, or top, perpendicular to its...

...; and if the base is a circle, &c., it is called a cone. 6. A sphere is a round solid, which may be conceived to be formed by the revolution of a semicircle about its diameter. 7. A frustum is the part left when the top is cut off. 8. A zone of a sphere is a part intercepted...

...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. The figure ACB represents a sphere. 8. A hemisphere is half a sphere. A segment of a sphere, or of...

...parallel to one another; and the others are parallelograms. 16. A Sphere is a solid figure described by the revolution of a semicircle about its diameter, which remains fixed. 17. The Axis of a sphere is the fixed straight line about which the semicircle revolves. 18. The Centre...

...is called the tranverse, and the shortest the conjugate. 44. A sphere or globe is a solid described by the revolution of a semicircle about its diameter, which remains fixed 45. The diameter of a sphere is a right line passing through the centre, and terminated on each side...