Books Books 1 - 10 of 180 on (1). Every section of a sphere made by a plane is a circle. Let.
(1). Every section of a sphere made by a plane is a circle. Let
Plane astronomy - Page 6
by Alexander Ronald Grant - 1850

A Treatise on Plane and Spherical Trigonometry

Robert Woodhouse - Plane trigonometry - 1819 - 264 pages
...called rectangular, isosceles, equilateral, in the same cases that a plane triangle isPROPOSITION I. Every section of a sphere made by a plane is a circle. Let AnBm be the plane, draw CO * perpendicular to it, which consequently, (by Euclid, Book XI. Def. 3.)...

Elements of Geometry

Adrien Marie Legendre - Geometry - 1819 - 208 pages
...diameters also are equal, and each double of the radius. 439. It will be demonstrated art. 452, that every section of a sphere made by a plane is a circle. This being supposed, we call a great circle the section made by a plane which passes through the centre,...

A treatise on plane and spherical trigonometry

Robert Woodhouse - 1822
...called rectangular, isosceles, equilateralj in the same cases that a plane triangle is. PRoPoSITIoN I. Every section of a sphere made by a plane is a circle. Let An Bn be the plane, draw СO* perpendicular to it, which consequently, (by Euclid, Book XI. Def. 3.)...

Elements of Geometry and Trigonometry: With Notes

Adrien Marie Legendre - Geometry - 1822 - 367 pages
...sector, j as DCF or FCH, describes a solid, which is named a spherical sector. PROPOSITION I. THEOREM. Every section of a sphere, made by a plane, is a circle. Let AMB be the section, made by a plane, in the sphere whose centre is C. From the point C, draw CO perpendicular...

Elements of Geometry...: Translated from the French for the Use of the ...

Adrien Marie Legendre - Geometry - 1825 - 224 pages
...diameters also are equal, and each double of the radius. 439. It will be demonstrated art. 452, that every section of a sphere made by a plane is a circle. This being supposed, we call a great circle the section made by a plane which passes through the centre,...

Elements of Geometry...: Translated from the French for the Use of the ...

Adrien Marie Legendre, John Farrar - Geometry - 1825 - 224 pages
...diameters also are equal, and each double of the radius. 439. It will be demonstrated art. 452, that every section of a sphere made by a plane is a circle. This being supposed, we call a great circle the section made by a plane which passes through the centre,...

The Builder's Complete Guide: Comprehending the Theory and Practice of the ...

Charles Frederick Partington - Building - 1825 - 304 pages
...be circles, provided that the axis of the cylinder, or cone, tend to the centre of the sphere. For every section of a sphere made by a plane is a circle, and every section of a right cylinder, or cone, perpendicular to the axis, is also a circle. Let the...

Elements of Geometry

Adrien Marie Legendre - 1825 - 224 pages
...circular sector as DCF, or FCH, describes a solid which is called a spherical sector. THEOREM. 452. Every section of a sphere made by a plane is a circle. ?ig. 221. Demonstration. Let AMB (fig. 221) be a section, made by a plane, of the sphere of which C...