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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 584
by Charles Davies, William Guy Peck - 1859 - 592 pages
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Elements of Geometry: Including Plane, Solid, and Spherical Geometry

George Washington Hull - Geometry - 1807 - 398 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...
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First Lessons in Geometry: With Practical Applications in Mensuration, and ...

Charles Davies - Geometrical drawing - 1840 - 252 pages
...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....
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A Practical System of Mensuration of Superficies and Solids ...

J. M. Scribner - Measurement - 1844 - 123 pages
...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....
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Elements of plane (solid) geometry (Higher geometry) and trigonometry (and ...

Nathan Scholfield - 1845
...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...
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Elements of Drawing and Mensuration Applied to the Mechanic Arts: A Book for ...

Charles Davies - Geometrical drawing - 1846 - 240 pages
...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....
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Elementary Geometry: With Applications in Mensuration

Charles Davies - Geometry - 1850 - 216 pages
...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....
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ELEMENTARY GEOMETRY, WITH APPLICATIONS IN MENSURATION.

CHARLES DAVIS, L.L. D. - 1850
...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....
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Elements of Geometry and Trigonometry: With Applications in Mensuration

Charles Davies - Geometry - 1886 - 324 pages
...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-...
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Elements of Geometry and Trigonometry

C. Davies - 1867
...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-...
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Elements of Geometry and Trigonometry

Adrien Marie Legendre - Geometry - 1871 - 187 pages
...the sector. 15. A plane is TANGENT TO A SPHERE when it touches it in a single point. 16. A ZONE is a portion of the surface of a sphere included between two parallel planes. The bounding lines of the sections are called bases of the zone, and the distance between the planes is...
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