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" THEOREM. Two triangles on the same sphere, or on equal spheres, are equal in all their parts, when they have each an equal angle included between equal sides. Suppose the side... "
Elements of Geometry: With, Practical Applications - Page 276
by George Roberts Perkins - 1850 - 320 pages
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The Journal of Speculative Philosophy, Volume 11; Volume 19

Electronic journals - 1885 - 456 pages
...we cannot know by a single intuition. For instance; two triangles lie before me, and I am told that two angles and the included side of the one are equal to the two angles and the included side of the other ; and I am further told that, such being the case,...
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