 | George Washington Hull - 1807 - 408 sider
...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... | |
 | Charles Davies - 1840 - 262 sider
...poles of a sphere 1 17. When is a plane said to be tangent to a sphere '( Of the Round Bodies. 18. A zone is a portion of the surface of a sphere, included between two parallel planes which form its bases. Thus, the part of the surface included between the planes AE and DP is a zone.... | |
 | J. M. Scribner - 1844 - 130 sider
...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.... | |
 | Nathan Scholfield - 1845 - 894 sider
...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... | |
 | Charles Davies - 1846 - 254 sider
...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 between two parallel planes which form its bases. Thus, the part of the surface included between the planes AE and DF is a zone.... | |
 | J. M. Scribner - 1849 - 286 sider
...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 - 1850 - 238 sider
...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 between two parallel planes which form its bases. Thus, the purt of the surface included between the planes AE and DF is a zone.... | |
 | Charles Davies - 1850 - 218 sider
...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 between two parallel planes which form its bases. Thus, the part of the surface included between the planes AE and DF is a zone.... | |
 | Charles Davies - 1886 - 340 sider
...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 between two parallel planes which form its bases- Thus, the part of the surface included between the planes AE and DF is a zone-... | |
 | Charles Davies - 1854 - 436 sider
...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... | |
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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. 
