Legendre, A. M. (Adrien Marie), 1752-1833, Brewster, David, Sir, 1781-1868, Davies, Charles, 1798-1876 · New York, Wiley & Long · leaf 190
190 GEOMETRY. … the arcs are equal ; hence the point D is the pole of the smallcircle FNG ; and for like reasons, the point E is the other pole. Cor. 1. Every arc DM,drawn from a point inthe arc of a great circleAMB to its pole, is a quar-ter of the circumference,which for the sake ofbrevity, is usually nameda…
Trigonometry · Geometry
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