 | Philip Thomas Main - Astronomy - 1868 - 224 pages
...definitions and prove a few propositions relating to the geometry of the sphere. DBF. A sphere is a surface every point of which is equally distant from a point within it called the centre. It follows at once that every plane section of a sphere through the centre is... | |
 | Eli Todd Tappan - Geometry - 1868 - 444 pages
...the following definitions: A CIRCLE is a portion of a plane bounded by a line called a CIRCUMFERENCE, every point of which is equally distant from a point within called the CENTER. 146. Theorem. — A circumference is curved throughout. For a straight line can not have... | |
 | Wilshire S. Courtney - Agriculture - 1869 - 532 pages
...perpendicular to AB at its centre is called the minor diameter. A Sphere is a solid, bounded by a convex surface, every point of which is equally distant from a point within called the centre ; as, Fig. 22. A Spheroid is a solid, generated by the revolution of an ellipse about one... | |
 | Charles Davies - Geometry - 1872 - 464 pages
...of the cone, along lines which are called elements of cotUact. 12. A SPHERE is a volume bounded by a surface, every point of which is equally distant from a point within called the centre. A sphere may be generated by a semicircle revolving about its diameter as an axis. 13.... | |
 | George Payn Quackenbos - Arithmetic - 1872 - 350 pages
...it cost, at 20c. a cubic foot? Ans. $8.48. 537. SPHERES. — A Sphere is a body bounded by a curved surface, every point of which is equally distant from a point within, called the centre. RULES. — I. To find the surface of a sphere, multiply the square of the diameter by 3.14159.... | |
 | William Frothingham Bradbury - Geometry - 1872 - 124 pages
...CIRCLE. DEFINITIONS. 1. A Circle is a plane figure bounded by a curved line called the circumference, every point of which is equally distant from a point within called the centre ; as ABD E. 2. The Eadius of a circle is a line drawn from the centre to the circumference... | |
 | William Frothingham Bradbury - Geometry - 1872 - 262 pages
...CIRCLE. DEFINITIONS. 1. A Circle is a piano figure bounded by a curved line called the circumference, every point of which is equally distant from a point within called the centre ; as ABD E. 2. The Radius of a circle is a lino drawn from the centre to the circumference... | |
 | Eli Todd Tappan - Geometry - 1873 - 288 pages
...the following definitions: A CIRCLE is a portion of a plane bounded by a line called a CIRCUMFERENCE, every point of which is equally distant from a point within called the CENTER. 146. Theorem — A circumference is curved throughout. For a straight line can not have... | |
 | Gerardus Beekman Docharty - Calculus - 1865 - 328 pages
...of intersection. CHAPTER II. ON THE CIRCLE. (28.) The circumference of the circle is a plane curve, every point of which is equally distant from a point within called the centre. PROPOSITION I. (29.) The equation of the circle referred to oblique axes is (xx'Y+(yy'Y±1(xx')... | |
 | Sir Norman Lockyer - Astronomy - 1874 - 332 pages
...is a magnitude that has length, breadth, and thickness. 37. A Sphere is a solid bounded by a curved surface every point of which is equally distant from a point within, called the centre. A Hemisphere is half a sphere. A Diameter of a sphere is a straight line passing through... | |
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A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center. 
