... vertices of thispolygon.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 theorem6 .92 . Prove that th e intersection points ... circumsribed about circle S is equal toc. Prove that a2+ b2= c2.See also Problems 2. 59, 4 .9, 9. 23, 9. 44, 10.63, 10.67, 13.10, 13.56, 20.11.§5. Hexagons6.48. The opposite sides of a convex ... OQ.5 .95 . Chord P Q of the circumscribed circle of triangle ABC is perpendicular to sideBC. Prove that Simson’s line of point P with respect to triangle ABC is parallel to lineAQ.5 .96 . The...