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26/01/2014, 13:20
... vertices of this polygon See also Problems 4. 49, 4.50, 9. 82, 9. 85, 9. 86, 11.35, 13.14, 14.26, 16.8, 17.33, 17.34, 19. 9, 23.13, 23.15 9 Pascal’s theorem 6 .92 Prove that the intersection points of ... = 90 ◦ + = 90 ◦ + = ∠AOd B, 2 cf Problem 5.3 Therefore, quadrilateral ABOd Oc is an inscribed one, i.e., ∠A ∠Oc Od B = 180 − ∠Oc AB = 180 − Similarly, ∠Oa Od B = 180 − ∠C Since ∠A + ∠C = 180 ... equal (ei , x)2 = 144 CHAPTER POLYGONS See also Problems 2 .9, 4. 59, 4.62, 6.36, 6.41, 6.45–6.47, 9. 83, 9. 84, 11.46, 11.48, 17.31, 18.30, 19. 47, 23.8, 24.2 §7 The inscribed and circumscribed polygons...