Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 130
ral, equi-angular, right, and oblique, under the same conditions as planetriangles are named isosceles, equilateral, equiangular, right,and oblique. THE RIGHT SPHERICAL TRIANGLE 141 The following propositions are proved in Geometry. (SeeWentworths Geometry, §§ 815, 790, 795, 793.) 1. If two angles…
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