Beman, Wooster Woodruff, 1850-1922, Smith, David Eugene, 1860-1944 · Boston, Ginn & company · leaf 152
3 is a special case where P is at 0, and merely affirms thata central angle equals itself. Fig. 4 shows that prop. XI is a special caseof prop. XIV. Fig. 6 shows the same for prop. XIII. Corollary. 3. An angle formed by a secant and a tan-gent, or by two tangents, equals the difference of half… … Given two parallel lines. I and II. intercepting arcs AB. I>. on the circumference of a circle with center 0. To prove that AB = CI). Proof. 1. Suppose YOY _L I. and to cut BC at 31 Fig. 1. Then YY ± II. I. prop. XVII, cor- 1 2. And BM = MC, and AM= JIB. Prop. V 3. ..AB=CD. Ax. 3 Note. The proof…
Geometry
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