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A zone is a portion of the surface of a sphere included between two parallel planes.
A Practical System of Mensuration of Superficies and Solids ... - Page 80
by J. M. Scribner - 1844 - 123 pages

## Elements of Geometry: Including Plane, Solid, and Spherical Geometry

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...

## An Introduction to Mensuration and Practical Geometry

John Bonnycastle - Geometry - 1829 - 256 pages
...after the segment is cut off. OP SOLIDS. cepted between two parallel planes; and when those planes are equally distant from the centre, it is called the middle zone of the sphere. 18. The height of a solid is a perpendicular, drawn from its vertex to the base or plane...

## First Lessons in Geometry: With Practical Applications in Mensuration, and ...

Charles Davies - Geometrical drawing - 1840 - 262 pages
...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. The bases of this zone...

## Elements of plane (solid) geometry (Higher geometry) and trigonometry (and ...

Nathan Scholfield - 1845 - 896 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....

## Elements of Drawing and Mensuration Applied to the Mechanic Arts: A Book for ...

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...between two parallel planes which form its bases. Thus, the part of the surface included between the planes AE and DF is a zone. The bases of this zone...

## An Introduction to Mensuration and Practical Geometry

John Bonnycastle - Geometry - 1848 - 320 pages
...of a sphere, is that part which is intercepted between two parallel planes ; and when those planes are equally distant from the centre, it is called the middle zone of the sphere. 18. The height of a solid is a perpendicular, drawn from its vertex to the base or plane...

## Scribner's Engineers' and Mechanics' Companion: Comprising United States ...

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,...

## Elementary Geometry: With Applications in Mensuration

Charles Davies - Geometry - 1850 - 236 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...between 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...