...the revolution of a semi-circle (or circle) about its diameter regarded as fixed. Hence, it is a body bounded by a surface all points of which are equally distant from a point within called the centre. FIG. 59. 457. The straight line joining the centre to any point on the surface is a radius...

...see page 217. BOOK II. THE CIRCLE. DEFINITIONS. 150. A circle is a plane figure bounded by a curve, all points of which are equally distant from a point within called the centre. The curve which bounds the circle is called the circumference, and any portion of it is...

...upper part of it by a plane parallel to the base. A sphere is a volume bounded by a curved sin-face, all points of which are equally distant from a point within, called the centre. treats of the measurement of lines, surface*. "Fig. 21 .Mensuration find rolumes. RULES....

...of brick does the chimney contain ? ARITHMETICAL EXERCISES. A Sphere is a solid bounded by a curved surface all points of which are equally distant from a point within called the centre. A straight line drawn from the centre to the surface is called a radius, and a straight...

...DEFINITIONS. 210. A circle is a portion of a plane bounded by a curved line called a circumference, all points of which are equally distant from a point within called the centre. 211. A radius is a straight line drawn from the centre to the circumference ; and a diameter...

...line passing through the center and terminating in both directions in the surface of the sphere. 506. A sphere is a solid bounded by a surface, all points of which are equally distant from a point which is the center. 507. A cylindrical surface is a surface that may be generated by the motion of...

...lead is heavier than water; therefore, lead will sink. A circle is a plane figure bounded by a curve, all points of which are equally distant from a point within called the centre; the figure on the blackboard is a plane figure bounded by a curved line, all points of...

...altitude of the triangle. OIECLES. 183. A circle is a portion of a plane bounded by a curved line, all points of which are equally distant from a point within called the centre. The bounding line is called the circumference. Any portion of the circumference is called...

...ft. How many cubic feet of brick does the chimney contain ? A Sphere is a solid bounded by a curved surface all points of which are equally distant from a point within called the centre. A straight line drawn from the centre to the surface is called a radius. and a straight...

...plane parallel to the base. 546. A Sphere is a body bounded by a uniformly curved surface, all the points of which are equally distant from a point within called the center. 547. The Diameter of a sphere is a straight line passing through the center of the sphere, and terminated...