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The centre of the sphere is the vertex of the pyramid, and the spherical polygon is the base of the pyramid.
Elements of Geometry with Exercises for Students: An an Introduction to ... - Page 316
by Aaron Schuyler - 1876 - 372 pages

## Elements of Geometry, and Plane and Spherical Trigonometry: With Numerous ...

Horatio Nelson Robinson - Geometry - 1860 - 470 pages
...of the surface of a sphere included between two great semi-circumferences having a common diameter. 7. A Spherical Pyramid is a portion of a sphere bounded by the faces of a solid angle having its vertex at the center, and the spherical polygon which these faces...

## Elements of Geometry and Trigonometry

Adrien Marie Legendre - Geometry - 1863 - 464 pages
...portion of the surface of a sphere bounded by semi-circumferences of two great circles. 6. A SPHEEICAL PYRAMID is a portion of a sphere bounded by a spherical polygon and sectors of circles whose common centre is the centre of the sphere. The spherical polygon is called...

## A Treatise on Elementary Geometry: With Appendices Containing a Collection ...

William Chauvenet - Geometry - 1871 - 380 pages
...equilateral, in the same cases as a plane triangle. 62. Definition. A spherical pyramid is a solid bounded by a spherical polygon and the planes of the sides of the polygon ; as O-ABCD. The centre of the sphere is the vertex of the pyramid ; the spherical polygon is its base....

## Elements of Geometry and Trigonometry from the Works of A.M. Legendre ...

Charles Davies - Geometry - 1872 - 464 pages
...LUNE is a portion of the surface of a sphere bounded by two semi-circumferences of great circles. 6. A SPHERICAL PYRAMID is a portion of a sphere bounded by a spherical polygon and sectors of circles whose common centre is the centre of the sphere. The spherical polygon is called...

## A Treatise on Elementary Geometry: With Appendices Containing a Collection ...

William Chauvenet - Geometry - 1872 - 382 pages
...equilateral, in the same cases as a plane triangle. 62. Definition. A spherical pyramid is a solid bounded by a spherical polygon and the planes of the sides of the polygon; as 0-ABCD. The centre of the sphere is-the vertex of the pyramid; the spherical polygon is its base....

## Elements of Geometry and Trigonometry: From the Works of A.M. Legendre

Adrien Marie Legendre - Geometry - 1874 - 500 pages
...bounded by a lune and two semicircles, which intersect in a diameter of the sphere. 6. A SPHEBICAL PYRAMID is a portion of a sphere bounded by a spherical polygon and sectors of circles whose common centre is the centre of the sphere. The spherical polygon is called...

## Manual of Geometry and Conic Sections: With Applications to Trigonometry and ...

William Guy Peck - Conic sections - 1876 - 412 pages
...polygon of three sides. Spherical triangles are classified in the same manner as plane triangles. 129. A spherical pyramid is a portion of a sphere bounded by a spherical polygon, and by sectors of circles whose arcs are the sides of the polygon. MANUAL OF GEOMETRY. 130. A lune is a...

## Elements of Plane and Solid Geometry

George Albert Wentworth - Geometry - 1877 - 426 pages
...the centre of the sphere, and whose face angles are measured by the sides of the polygon. 717. DEF. A spherical Pyramid is a portion of a sphere bounded...spherical polygon is the base of the pyramid, and the centre of the sphere is its vertex. 718. DEF. A spherical Triangle is a spherical polygon of three...