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<p>Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
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<br>Subjects: equal; angle; angles; hnslcdhygoogic; sides; triangles; perpendicular; triangle; parallel; polygon; regular polygon; infinitely small; spherical triangle; parallel lines; hnslcdhygoogic plane; regular polygons; convex surface; solid angle; equal distances; plane parallel</div>
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Benjamin Peirce</div>
Internet Archive identifier