51. 3 Isosceles Trapezoids

3 Isosceles Trapezoids
URL: http://www.cut-the-knot.org/Curriculum/Geometry/TwoTrapezoids.shtml - 20kb - 19 Jun 2006

52. Apollonius Problem

Apollonius Problem
URL: http://www.cut-the-knot.org/Curriculum/Geometry/Apollonius.shtml - 20kb - 19 Jun 2006

53. Analog device simulation for Pythagorean Theorem

Analog device simulation for Pythagorean Theorem to use in Math Fairs
URL: http://www.cut-the-knot.org/pythagoras/PythDroodle.shtml - 20kb - 19 Jun 2006

54. Fermat's Point

Fermat's Point: a dynamic illustration of several properties of Fermat's point
URL: http://www.cut-the-knot.org/Curriculum/Geometry/FermatPoint.shtml - 20kb - 19 Jun 2006

55. Interactive Mathematics Activities, Thematic bundle: Pythagorean Theorem

Interactive Mathematics Activities, Thematic bundle: Pythagorean Theorem
URL: http://www.cut-the-knot.org/SoftwareStore/Bundles/PythagoreanTheorem.shtml - 20kb - 19 Jun 2006

56. 9-point Circle as a locus of concurrency: What Is This About?

9-point Circle as a locus of concurrency: What Is This About
URL: http://www.cut-the-knot.org/Curriculum/Geometry/Griffiths.shtml - 20kb - 19 Jun 2006

57. Two Circles in a Parallelogram

Two Circles in a Parallelogram meet on a diagonal
URL: http://www.cut-the-knot.org/Curriculum/Geometry/CirclesAndParallelogram.shtml - 20kb - 19 Jun 2006

58. An Anticomplementary Triangle Surprise

An Anticomplementary Triangle Surprise: two step Napoleon's triangle construction yields the anticomplementary triangle
URL: http://www.cut-the-knot.org/Curriculum/Geometry/AnticomplementaryTriangle.shtml - 20kb - 19 Jun 2006

59. Two Butterflies Theorem II

Two Butterflies Theorem II
URL: http://www.cut-the-knot.org/Curriculum/Geometry/TwoButterflies2.shtml - 21kb - 19 Jun 2006

60. Two Butterflies Theorem III

Two Butterflies Theorem III
URL: http://www.cut-the-knot.org/Curriculum/Geometry/TwoButterflies3.shtml - 21kb - 19 Jun 2006

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