Beman, Wooster Woodruff, 1850-1922, Smith, David Eugene, 1860-1944 · Boston, Ginn & company · leaf 356
trahedron, and all intersect in the center of thecircumscribed sphere. 708. To construct a sphere of given radius whose surface shall containthree given points. 709. Also, of given radius whose surface shall contain two givenpoints and be tangent to a given plane. Secs. 467, 468.] THE SPHERE. 339… … In the above figure the two polygons are ABCD, ABCD. These polygons have their like-lettered angles and sidesequal respectively. For example. /. A = Z A, since they have the same numerical measureas the opposite dihedral angles of planes ADODA and ABOBA. Also,AB = AB\ since the central angles BOA…
Geometry
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