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| Introduction Preparing to Solve a Problem SECTION I A New Twist on Familiar Topics 1.Congruence and Parallelism 2.Triangles in Proportion 3.The Pythagorean Theorem 4.Circles Revisited 5.Area Relationships SECTION II Further Investigations 6.A Geometric Potpourri 7.Ptolemy and the Cyclic Quadrilateral 8.Menelaus and Ceva: Collinearity and Concurrency 9.The Simson Line 10.The Theorem of Stewart Hints "Appendix I: Selected Definitions， Postulates， and Theorems" Appendix II: Selected Formulas |
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