11. Diagonal Count in a Polygon

Diagonal Count in a Polygon. Mathematical Droodle: How many are there?
URL: http://www.cut-the-knot.org/Curriculum/Geometry/DiagonalCount.shtml - 20kb - 19 Jun 2006

12. Center-circles and Their Chains

Center-circles and Their Chains. Mathematical Droodle: What is this?
URL: http://www.cut-the-knot.org/Curriculum/Geometry/CenterCircle.shtml - 20kb - 19 Jun 2006

13. Pythagorean Theorem By Dissection II

Pythagorean Theorem By Dissection II. Mathematical Droodle: What is it?
URL: http://www.cut-the-knot.org/Curriculum/Geometry/Pyth30.shtml - 20kb - 19 Jun 2006

14. Pythagorean Theorem By Dissection III

Pythagorean Theorem By Dissection III. Mathematical Droodle: What is it?
URL: http://www.cut-the-knot.org/Curriculum/Geometry/Pyth36.shtml - 20kb - 19 Jun 2006

15. Pythagorean Theorem By Dissection

Pythagorean Theorem By Dissection. Mathematical Droodle: What is it?
URL: http://www.cut-the-knot.org/Curriculum/Geometry/PythLattice.shtml - 20kb - 19 Jun 2006

16. Morley's Theorem

Morley's Theorem. Mathematical Droodle: What is it?
URL: http://www.cut-the-knot.org/Curriculum/Geometry/Morley.shtml - 20kb - 19 Jun 2006

17. Circle Chains and Inscribed Angles

Circle Chains and Inscribed Angles. Mathematical Droodle: What is it?
URL: http://www.cut-the-knot.org/Curriculum/Geometry/ManyCircles.shtml - 20kb - 19 Jun 2006

18. Law fo Cosines

Law fo Cosines. Mathematical Droodle: What is this?
URL: http://www.cut-the-knot.org/Curriculum/Geometry/LawOfCosines.shtml - 20kb - 19 Jun 2006

19. Pairs of Incircles in a Quadrilateral

Pairs of Incircles in a Quadrilateral. Mathematical Droodle: What is it?
URL: http://www.cut-the-knot.org/Curriculum/Geometry/IncirclesInQuadri.shtml - 22kb - 19 Jun 2006

20. Kiepert's Theorem

Kiepert's Theorem. Mathematical Droodle: What is this?
URL: http://www.cut-the-knot.org/Curriculum/Geometry/Kiepert.shtml - 23kb - 19 Jun 2006

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