...distance from the vertex to the middle of the base of any of its triangular sides; as A 0 in the figure. A cone is a solid whose base is a circle and whose surface tapers uniformly to a point. A sphere is a solid with a curved surface, every point of which is equally distant from a point within...

...altitude. The altitude, as AC, of one of the triangles of a pyramid is the slant height of the pyramid. A solid whose base is a circle and whose surface . tapers uniformly to a point, the vertex, is a circular cone. In this book "cone" means "right circular cone." The vertex of a cone...

...lateral surface. See that your pupils do not confuse altitude of pyramid and altitude of triangle. A cone is a solid whose base is a circle and whose lateral surface tapers uniformly to a point called the vertex of the cone. In this book " cone " means...

...Pyramids, like prisms, take their names from the forms of their bases ; as, triangular, pentagonal, etc. A cone is a solid whose base is a circle and whose surface tapers uniformly to the vertex, The altitude of a pyramid or a cone is the distance from the vertex to the center of the...

...edges meeting at a common point, called the vertex. (Fig. 54.) Fia. 54.—Pyramid. FIG. 55.—Cone. A cone is a solid whose base is a circle, and whose lateral surface slopes upward to a point called the vertex. (Fig. 55.) The slant height of a pyramid...