 | Arthur A. Dodd, B. Thomas Chace - Geometry - 1898 - 468 pages
...sides; as AOBC D. The lune ABCD is called the base of the wedge and the diameter AB is the edge. 673. A zone is a portion of the surface of a sphere included between two parallel planes. The circumferences of the secions are called the bases of the zone. The distance between he bases is the... | |
 | James Howard Gore - Geometry - 1898 - 232 pages
...area. QED 527. Con. The area of a spherical polygon is equal to its spherical excess. THE SPHERE. 528. A Zone is a portion of the surface of a sphere included between parallel planes. The circumference of the circles which bound the zone are called the Bases, and the... | |
 | Arthur A. Dodd, B. Thomas Chace - Geometry - 1898 - 468 pages
...sphere is less than the radius of the sphere. 368 SPHERICAL MEASUREMENTS. DEFINITIONS. 670. A lune is a portion of the surface of a sphere included between two semicircumferences of great circles; as ABC D. The angle of the lune is the angle formed by its bounding... | |
 | George Albert Wentworth - Geometry - 1899 - 496 pages
...circumference of the great circle. BOOK VIII. SOLID GEOMETRY. MEASUREMENT OF SPHERICAL SURFACES. 817. DBF. A zone is a portion of the surface of a sphere included between two parallel planes. The circumferences of the sections made by the planes are called the bases of the zone, and the distance... | |
 | George Albert Wentworth - Geometry, Solid - 1899 - 246 pages
...circumference of the great circle. BOOK VIII. SOLID GEOMETRY. MEASUREMENT OF SPHERICAL SURFACES. 817. DEF. A zone is a portion of the surface of a sphere included between two parallel planes. The circumferences of the sections made by the planes are called the bases of the zone, and the distance... | |
 | Webster Wells - Geometry - 1899 - 180 pages
...equal to its lateral area multiplied by one-fifth the radius of its base. THE SPHERE. DEFINITIONS. 662. A zone is a portion of the surface of a sphere included between two parallel planes. The circumferences of the circles which bound the zone are called the bases, and the perpendicular distance... | |
 | George Albert Wentworth - Geometry, Solid - 1902 - 246 pages
...perpendicular to the circumference of the great circle. MEASUREMENT OF SPHERICAL SURFACES. 817. DBF. A zone is a portion of the surface of a sphere included between two parallel planes. The circumferences of the sections made by the planes are called the bases of the zone, and the distance... | |
 | Alan Sanders - Geometry - 1903 - 396 pages
...an axis is equal to AD x 2 ir OM. [ OM is the apothem of the regular polygon.] 1178. DEFINITIONS. . A zone is a portion of the surface of a sphere included between two parallel planes. The distance between the parallel planes is the altitude of the zone, and the circumferences of the circles... | |
 | George Albert Wentworth - Geometry - 1904 - 496 pages
...circumference of the great circle. BOOK VIII. SOLID GEOMETRY. MEASUREMENT OF SPHERICAL SURFACES. 817. DBF. A zone is a portion of the surface of a sphere included between two parallel planes. The circumferences of the sections made by the planes are called the bases of the zone, and the distance... | |
 | Frederick Thomas Hodgson - Architecture, Domestic - 1904 - 370 pages
...segment. The height of a segment is the distance from the middle of its base to the convex surface. 10. A zone is a portion of the surface of a sphere, included between two parallel planes, which form its bases. If the bases are equally distant from the center, it is called the middle zone.... | |
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The circumferences of the sections made by the planes are called the bases of the zone, and the distance between the planes is the altitude of the zone. 
