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" A zone is a portion of the surface of a sphere included between two parallel planes. "
Mathematical Dictionary and Cyclopedia of Mathematical Science Comprising ... - Page 582
by Charles Davies, William Guy Peck - 1859 - 592 pages
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Plane and Solid Geometry

William Betz - Geometry - 1916 - 536 pages
...of their radii or of their diameters. For - = •' "' ; .'.-, = -JT s 4 BV"° s' r* N 775. A zone is the portion of the surface of a sphere included between two parallel planes which meet the sphere. The circles in which the planes cut the sphere are called the bases of the zone....
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Builders' Reliable Estimator and Contractors' Guide: A Complete Guide for ...

Frederick Thomas Hodgson - 1917 - 696 pages
...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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Plane and Solid Geometry

Claude Irwin Palmer, Daniel Pomeroy Taylor - Geometry - 1918 - 460 pages
...of the fourth sphere to the plane, if each sphere has a radius of 8 in. Ans. 21.064 in. 806. Zones. The portion of the surface of a sphere included between two parallel planes is called a zone. It is evident that a zone can be considered as generated by an arc of a great circle....
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Solid Geometry

Claude Irwin Palmer - Geometry, Solid - 1918 - 192 pages
...their centers is 16 in. Find the radius of the circle of intersection of the two spheres. 806. Zones. The portion of the surface of a sphere included between two parallel planes is called a zone. It is evident that a zone can be consid- A', ered as generated by an arc of a great...
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