 | George Washington Hull - Geometry - 1807 - 408 pages
...undecim = eleven, + Gr. gonia = an angle.] A polygon of eleven sides. Zone. [Gr. zone — a girdle.] A portion of the surface of a sphere included between two parallel planes. BIOGRAPHICAL NOTES. IN these notes will be found brief sketches of eminent mathematicians who have... | |
 | J. M. Scribner - Measurement - 1844 - 130 pages
...14. The height of a segment is the distance from the middle of its base to the convex surface. 15. 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 centre, it is 'called the middle zone. 16. The height of... | |
 | Nathan Scholfield - 1845 - 894 pages
...grent circle. 19. A plane is tangent to a sphere, when their surfaces have but one point in common. 20. A zone is a portion of the surface of a sphere included...between two parallel planes, which form its bases. One of ihese planes may be tangent to a sphere ; in which case, the zone has only a single base. 21.... | |
 | Charles Davies - Geometrical drawing - 1846 - 254 pages
...in common with it. Thus, AB is a tangent plane. 50. What is a spherical zone ? what are its bases ? A zone is a portion of the surface of a sphere, included...of the surface included between the planes AE and DF is a zone. The bases of this zone are two circles whose diameters are AE and DF. 51. When will a... | |
 | J. M. Scribner - Mechanical engineering - 1849 - 286 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 hetween two parallel planes, which form its bases. If the bases are equally distant from the center,... | |
 | Charles Davies - Geometry - 1850 - 218 pages
...it has but one point in common with it. Thus, AB is a tangent plane, touching the sphere at B. 32. A zone is a portion of the surface of a sphere, included...of the surface included between the planes AE and DF is a zone. The bases of this zone are the two circles whose diameters are AE and DF. B 33. One of... | |
 | Charles Davies - Geometry - 1850 - 238 pages
...it has but one point in common with it. Thus, AB is a tangent plane, touching the sphere at B. 32. A zone is a portion of the surface of a sphere, included...two parallel planes which form its bases. Thus, the purt of the surface included between the planes AE and DF is a zone. The bases of this zone are the... | |
 | Charles Davies - Geometry - 1886 - 340 pages
...when it has but one point in common with it- Thus, AB is a tangent plane, touching the sphere at B32 A zone is a portion of the surface of a sphere, included...of the surface included between the planes AE and DF is a zone- The bases of this zone are the two circles whose diameters are AE and DF33 One of the... | |
 | Charles Davies - Geometry - 1854 - 436 pages
...POLYGON is a portion of the surface of a sphere bounded by three or more arcs of great circles. 4. A LUNE is a portion of the surface of a sphere included between two semi•circles intersecting in a common diameter of the sphere. 5. A SPHERICAL WEDGE, or UNGULA, is... | |
 | Charles Davies, William Guy Peck - Electronic book - 1855 - 592 pages
...equal to the area of the lune multiplied by one-third of the radius of the sphere. 34 SPHERICAL ZONE. A portion of the surface of a sphere included between two parallel planes. The circles in which these planes intersect the surface of the sphere arc called bases, and the distance... | |
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A zone is a portion of the surface of a sphere included between two parallel planes. 
