A thread from the Geometry Forum newsgroup archive

(2-col.) Proofs (see also Sketchpad & Triangle Congruence)

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  1. Two-column proofs by Bob Hayden on 01/23/95.
  2. Re: Two-column proofs by John Conway on 01/24/95.
  3. Re: Two-column proofs by Lou Talman on 01/24/95.
  4. Re: Two-column proofs by Judy Roitman on 01/24/95.
  5. Re: Two-column proofs by Heidi Burgiel on 01/24/95.
  6. Re: Two-Column Proofs by Mark Saul on 01/24/95.
  7. Re: Two-column proofs by John Conway on 01/24/95.
  8. Re: Two-column proofs by John Conway on 01/24/95.
  9. Re: Two-Column Proof by John Conway on 01/24/95.
  10. Re: Two-column proofs by Walter Whiteley on 01/24/95.
  11. Re: Two-column proofs by Pat Ballew on 01/25/95.
  12. Re: Two-column proofs by Dave Wilson on 01/25/95.
  13. 2-col. proofs by Bob Hayden on 01/25/95.
  14. Formal Proofs in Geometry by Walter Whiteley on 01/25/95.
  15. 2-column proof example by Annie Fetter on 01/25/95.
  16. Re: 2-col. proofs by John Conway on 01/25/95.
  17. Re: Two-Column Proof by W Gary Martin on 01/25/95.
  18. Re: Two-column proofs by Lou Talman on 01/25/95.
  19. Re: 2-col. proofs by Michael Keyton on 01/25/95.
  20. Re: 2-col. proofs by John Conway on 01/26/95.
  21. Re: Two-column proofs by Michelle Manes on 01/27/95.
  22. Re: Two-column proofs by Andrei TOOM on 01/27/95.
  23. Re: Two-column proofs by Lou Talman on 01/27/95.
  24. Re: Two-column proofs by W Gary Martin on 01/27/95.
  25. Re: Two-column proofs by Andrei TOOM on 01/27/95.
  26. 2 column proofs by Ronda Delcamp (Lewandowski) on 01/28/95.
  27. Re: 2 column proofs by B. Overkamp on 01/28/95.
  28. Still two column proofs by John Benson on 01/28/95.
  29. Re: 2 column proofs by Scott Smith on 01/28/95.
  30. Re: 2 column proofs by Andrei Toom on 01/29/95.
  31. Re: Two-column proofs by John Conway on 01/29/95.
  32. Re: 2-col. proof by John Conway on 01/29/95.
  33. Re: 2 column proofs by John Conway on 01/29/95.
  34. Re: Two-column proofs by R. D. Foster on 01/29/95.
  35. Re: 2 column proofs by Dan Hirschhorn on 01/30/95.
  36. Re: Still two column proofs by Robin Mc Leod on 01/30/95.
  37. Re: Still two column proofs by John Conway on 01/30/95.
  38. Not quite two column proofs by Judy Roitman on 01/30/95.
  39. Re: 2 column proofs by W Gary Martin on 01/30/95.
  40. Re: 2-col. proofs by Bob Hayden on 01/30/95.
  41. Re: 2 column proofs by Gary Tupper on 01/30/95.
  42. Re: 2 column proofs by Walter Whiteley on 01/31/95.
  43. Re: 2 column proofs by John Conway on 01/31/95.
  44. Re: 2 column proofs by Walter Whiteley on 01/31/95.
  45. Proof in High school by John Benson on 01/31/95.
  46. 2-column proof by David Scott Powell on 02/01/95.
  47. Re: 2 column proofs by W Gary Martin on 02/01/95.
  48. 2-column proof by David Scott Powell on 02/01/95.
  49. Re: Proof in High school by Robin Mc Leod on 02/01/95.
  50. Re: 2 column proofs by Andrei TOOM on 02/01/95.
  51. Re: 2-column proof by William T. Webber on 02/01/95.
  52. Re: 2-column proof by John Conway on 02/01/95.
  53. Re: 2-column proof by Gary Tupper on 02/02/95.
  54. 2-column proof by David Scott Powell on 02/02/95.
  55. Re: 2-column proof by Henri Picciotto on 02/02/95.
  56. Re: 2 column proofs by Andrei TOOM on 02/02/95.
  57. Re: 2-column proof by Michelle Manes on 02/02/95.
  58. Re: 2-column proof by Dan Hirschhorn on 02/02/95.
  59. Re: 2-column proof by John Conway on 02/02/95.
  60. Re: 2-column proof by Michael Keyton on 02/02/95.
  61. Re: 2-column proof by Michelle Manes on 02/02/95.
  62. Re: 2-column proof by Jim Swiflt on 02/02/95.
  63. Re: Proof in High school by John Conway on 02/03/95.
  64. Re: 2-column proof by Bill Marthinsen on 02/03/95.
  65. Two-column proofs by WYATT WENDELL on 02/03/95.
  66. Two-column proofs by WYATT WENDELL on 02/03/95.
  67. 2-column proof by Mark Saul on 02/05/95.
  68. proving the obvious by Mark Saul on 02/05/95.
  69. Proofs in UK Schools by Jim Swift on 02/07/95.
  70. 2-column proofs: motivations/techniques by John Tant on 02/12/95.
  71. Re: 2-column proof by John Conway on 02/12/95.
  72. Re: 2-column proofs: motivations/techniques by David Scott Powell on 02/14/95.
  73. Re: Proofs in UK Schools by John Conway on 02/14/95.
  74. Re: 2-column proofs: motivations/techniques by LaVerta K Schmeling on 02/17/95.
  75. Re: 2-column proofs: motivations/techniques by Allan Mundsack on 02/19/95.
  76. Re: 2-column proofs: motivations/techniques by Lou Talman on 02/20/95.
  77. Re: 2-column proofs: motivations/techniques by Judy Roitman on 02/20/95.
  78. Re: 2-column proofs: motivations/techniques by Doris Schattschneider on 02/21/95.
  79. Re: 2-column proofs: motivations/techniques by Kathryn Garrett on 02/21/95.
  80. Re: 2-column proofs: motivations/techniques by John Tant on 02/21/95.
  81. A comment from Jan Hall by Sarah Seastone on 06/20/95.
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12/02/96