Tạp chí Hình học Geometricorum

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  1. LTTK CTV

    On the areas of the intouch and extouch triangles - Juan Carlos Salazar

    LTTK CTV, Oct 4, 2019
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    459
    LTTK CTV
    Oct 4, 2019
  2. LTTK CTV

    Orthopoles and the Pappus theorem - Atul Dixit and Darij Grinberg

    LTTK CTV, Oct 4, 2019
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    633
    LTTK CTV
    Oct 4, 2019
  3. LTTK CTV

    Steiner's theorems on the complete quadrilateral - Jean-Pierre Ehrmann

    LTTK CTV, Oct 4, 2019
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    396
    LTTK CTV
    Oct 4, 2019
  4. LTTK CTV

    The Archimedean circles of Schoch and Woo - Hiroshi Okumura and Masayuki Watanabe

    LTTK CTV, Oct 4, 2019
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    389
    LTTK CTV
    Oct 4, 2019
  5. LTTK CTV

    Extremes areas of triangles in Poncelet's closure theorem - Mirko Radic

    LTTK CTV, Oct 4, 2019
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    479
    LTTK CTV
    Oct 4, 2019
  6. LTTK CTV

    Another 5-step division of a segment in the golden section - Kurt Hofstetter

    LTTK CTV, Oct 4, 2019
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    357
    LTTK CTV
    Oct 4, 2019
  7. LTTK CTV

    Antiparallels and concurrency of Euler lines - Nikolaos Dergiades and Paul Yiu

    LTTK CTV, Oct 4, 2019
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    528
    LTTK CTV
    Oct 4, 2019
  8. LTTK CTV

    Antiorthocorrespondents of Circumconics - Bernard Gibert

    LTTK CTV, Oct 4, 2019
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    378
    LTTK CTV
    Oct 4, 2019
  9. LTTK CTV

    Sawayama and Thebault's theorem - Jean-Louis Ayme

    LTTK CTV, Oct 4, 2019
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    516
    LTTK CTV
    Oct 4, 2019
  10. LTTK CTV

    Circumrhombi - Floor van Lamoen

    LTTK CTV, Oct 4, 2019
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    357
    LTTK CTV
    Oct 4, 2019
  11. LTTK CTV

    Circumcenters of residual triangles - Eckart Schmidt

    LTTK CTV, Oct 4, 2019
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    524
    LTTK CTV
    Oct 4, 2019
  12. LTTK CTV

    A 5-step division of a segment in the golden section - Kurt Hofstetter

    LTTK CTV, Oct 4, 2019
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    435
    LTTK CTV
    Oct 4, 2019
  13. LTTK CTV

    Two triangle centers associated with the excircles - Milorad Stevanovic

    LTTK CTV, Oct 4, 2019
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    470
    LTTK CTV
    Oct 4, 2019
  14. LTTK CTV

    The Apollonius circle and related triangle centers - Milorad Stevanovic

    LTTK CTV, Oct 4, 2019
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    383
    LTTK CTV
    Oct 4, 2019
  15. LTTK CTV

    A tetrahedral arrangement of triangle centers - Lawrence Evans

    LTTK CTV, Oct 4, 2019
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    382
    LTTK CTV
    Oct 4, 2019
  16. LTTK CTV

    The parasix configuration and orthocorrespondence - Bernard Gibert and Floor van Lamoen

    LTTK CTV, Oct 4, 2019
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    369
    LTTK CTV
    Oct 4, 2019
  17. LTTK CTV

    A generalization of the Lemoine point - Charles Thas

    LTTK CTV, Oct 4, 2019
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    386
    LTTK CTV
    Oct 4, 2019
  18. LTTK CTV

    Rectangles attached to the sides of a triangle - Nikolaos Dergiades and Floor van Lamoen

    LTTK CTV, Oct 4, 2019
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    378
    LTTK CTV
    Oct 4, 2019
  19. LTTK CTV

    The M-configuration of a triangle - Alexei Myakishev

    LTTK CTV, Oct 4, 2019
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    370
    LTTK CTV
    Oct 4, 2019
  20. LTTK CTV

    Isotomic inscribed triangles and their residuals - Mario Dalcín

    LTTK CTV, Oct 4, 2019
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    364
    LTTK CTV
    Oct 4, 2019
  21. LTTK CTV

    Harcourt's theorem - Nikolaos Dergiades and Juan Carlos Salazar

    LTTK CTV, Oct 4, 2019
    Replies:
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    379
    LTTK CTV
    Oct 4, 2019
  22. LTTK CTV

    A note on the Schiffler point - Lev Emelyanov and Tatiana Emelyanova

    LTTK CTV, Oct 4, 2019
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    366
    LTTK CTV
    Oct 4, 2019
  23. LTTK CTV

    On the Kosnita point and the reflection triangle - Darij Grinberg

    LTTK CTV, Oct 4, 2019
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    437
    LTTK CTV
    Oct 4, 2019
  24. LTTK CTV

    Similar pedal and cevian triangles - Jean-Pierre Ehrmann

    LTTK CTV, Oct 4, 2019
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    597
    LTTK CTV
    Oct 4, 2019
  25. LTTK CTV

    The Lucas circles and the Descartes formula - Wilfred Reyes

    LTTK CTV, Oct 4, 2019
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    363
    LTTK CTV
    Oct 4, 2019
  26. LTTK CTV

    Triangle centers associated with the Malfatti circles - Milorad Stevanovic

    LTTK CTV, Oct 4, 2019
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    526
    LTTK CTV
    Oct 4, 2019
  27. LTTK CTV

    On the Fermat lines - Paul Yiu

    LTTK CTV, Oct 4, 2019
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    394
    LTTK CTV
    Oct 4, 2019
  28. LTTK CTV

    Napoleon triangles and Kiepert perspectors - Floor van Lamoen

    LTTK CTV, Oct 4, 2019
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    362
    LTTK CTV
    Oct 4, 2019
  29. LTTK CTV

    On the circumcenters of cevasix configurations - Alexei Myakishev and Peter Woo

    LTTK CTV, Oct 4, 2019
    Replies:
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    383
    LTTK CTV
    Oct 4, 2019
  30. LTTK CTV

    Some configurations of triangle centers - Lawrence Evans

    LTTK CTV, Oct 4, 2019
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    372
    LTTK CTV
    Oct 4, 2019
  31. LTTK CTV

    Bicentric pairs of points and related triangle centers - Clark Kimberling

    LTTK CTV, Oct 4, 2019
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    477
    LTTK CTV
    Oct 4, 2019
  32. LTTK CTV

    On the procircumcenter and related points - Alexei Myakishev

    LTTK CTV, Oct 4, 2019
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    391
    LTTK CTV
    Oct 4, 2019
  33. LTTK CTV

    Orthocorrespondence and orthopivotal cubics - Bernard Gibert

    LTTK CTV, Oct 4, 2019
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    490
    LTTK CTV
    Oct 4, 2019
  34. LTTK CTV

    An Application of Thébault's Theorem - Wilfred Reyes

    LTTK CTV, Oct 4, 2019
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    399
    LTTK CTV
    Oct 4, 2019
  35. LTTK CTV

    The Apollonius circle as a Tucker circle - Darij Grinberg and Paul Yiu

    LTTK CTV, Oct 4, 2019
    Replies:
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    407
    LTTK CTV
    Oct 4, 2019
  36. LTTK CTV

    Brahmagupta quadrilaterals - K. R. S. Sastry

    LTTK CTV, Oct 4, 2019
    Replies:
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    650
    LTTK CTV
    Oct 4, 2019
  37. LTTK CTV

    Some similarities associated with pedals - Jean-Pierre Ehrmann and Floor van Lamoen

    LTTK CTV, Oct 4, 2019
    Replies:
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    361
    LTTK CTV
    Oct 4, 2019
  38. LTTK CTV

    The Stammler circles - Jean-Pierre Ehrmann and Floor van Lamoen

    LTTK CTV, Oct 4, 2019
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    383
    LTTK CTV
    Oct 4, 2019
  39. LTTK CTV

    On some remarkable concurrences - Charles Thas

    LTTK CTV, Oct 4, 2019
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    401
    LTTK CTV
    Oct 4, 2019
  40. LTTK CTV

    Geometry and group structures of some cubics - Fred Lang

    LTTK CTV, Oct 4, 2019
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    372
    LTTK CTV
    Oct 4, 2019
  41. LTTK CTV

    The perimeter of a cevian triangle - Nicolaos Dergiades

    LTTK CTV, Oct 4, 2019
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    417
    LTTK CTV
    Oct 4, 2019
  42. LTTK CTV

    An elementary proof of the isoperimetric inequality - Nicolaos Dergiades

    LTTK CTV, Oct 4, 2019
    Replies:
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    389
    LTTK CTV
    Oct 4, 2019
  43. LTTK CTV

    Napoleon-like configurations and sequences of triangles - Barukh Ziv

    LTTK CTV, Oct 4, 2019
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    464
    LTTK CTV
    Oct 4, 2019
  44. LTTK CTV

    Loci related to variable flanks - Zvonko Cerin

    LTTK CTV, Oct 4, 2019
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    372
    LTTK CTV
    Oct 4, 2019
  45. LTTK CTV

    Paper-folding and Euler's theorem revisited - Benedetto Scimemi

    LTTK CTV, Oct 4, 2019
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    422
    LTTK CTV
    Oct 4, 2019
  46. LTTK CTV

    A Conic Through Six Triangle Centers - Lawrence Evans

    LTTK CTV, Oct 4, 2019
    Replies:
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    387
    LTTK CTV
    Oct 4, 2019
  47. LTTK CTV

    A generalization of the Tucker circles - Peter Yff

    LTTK CTV, Oct 4, 2019
    Replies:
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    391
    LTTK CTV
    Oct 4, 2019
  48. LTTK CTV

    A rapid construction of some triangle centers - Lawrence Evans

    LTTK CTV, Oct 4, 2019
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    368
    LTTK CTV
    Oct 4, 2019
  49. LTTK CTV

    A simple construction of the golden section - Kurt Hofstetter

    LTTK CTV, Oct 4, 2019
    Replies:
    0
    Views:
    394
    LTTK CTV
    Oct 4, 2019
  50. LTTK CTV

    The Lemoine cubic and its generalizations - Bernard Gibert

    LTTK CTV, Oct 4, 2019
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    383
    LTTK CTV
    Oct 4, 2019
  51. LTTK CTV

    The Napoleon configuration - Gilles Boute

    LTTK CTV, Oct 4, 2019
    Replies:
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    379
    LTTK CTV
    Oct 4, 2019
  52. LTTK CTV

    Equilateral chordal triangles - Floor van Lamoen

    LTTK CTV, Oct 4, 2019
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    368
    LTTK CTV
    Oct 4, 2019
  53. LTTK CTV

    ollineation, conjugacies, and cubics - Clark Kimberling

    LTTK CTV, Oct 4, 2019
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    405
    LTTK CTV
    Oct 4, 2019
  54. LTTK CTV

    Congruent inscribed rectangles - Jean-Pierre Ehrmann

    LTTK CTV, Oct 4, 2019
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    343
    LTTK CTV
    Oct 4, 2019
  55. LTTK CTV

    Some concurrencies from Tucker hexagons - Floor van Lamoen

    LTTK CTV, Oct 4, 2019
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    370
    LTTK CTV
    Oct 4, 2019
  56. LTTK CTV

    A pair of Kiepert hyperbolas - Jean-Pierre Ehrmann

    LTTK CTV, Oct 4, 2019
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    354
    LTTK CTV
    Oct 4, 2019
  57. LTTK CTV

    A Feuerbach type theorem on six circles - Lev Emelyanov

    LTTK CTV, Oct 4, 2019
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    384
    LTTK CTV
    Oct 4, 2019
  58. LTTK CTV

    Cubics associated with triangles of equal areas - Clark Kimberling

    LTTK CTV, Oct 4, 2019
    Replies:
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    449
    LTTK CTV
    Oct 4, 2019
  59. LTTK CTV

    P_ell-perpendicularity - Floor van Lamoen

    LTTK CTV, Oct 4, 2019
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    372
    LTTK CTV
    Oct 4, 2019
  60. LTTK CTV

    Conics associated with a cevian nest - Clark Kimberling

    LTTK CTV, Oct 4, 2019
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    420
    LTTK CTV
    Oct 4, 2019
  61. LTTK CTV

    Euler's formula and Poncelet's porism - Lev Emelyanov and Tatiana Emelyanova

    LTTK CTV, Oct 4, 2019
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    503
    LTTK CTV
    Oct 4, 2019
  62. LTTK CTV

    Simple constructions of the incircle of an arbelos - Peter Woo

    LTTK CTV, Oct 4, 2019
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    374
    LTTK CTV
    Oct 4, 2019
  63. LTTK CTV

    The Kiepert pencil of Kiepert hyperbolas - Floor van Lamoen and Paul Yiu

    LTTK CTV, Oct 4, 2019
    Replies:
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    382
    LTTK CTV
    Oct 4, 2019
  64. LTTK CTV

    A note on the Feuerbach point - Lev Emelyanov and Tatiana Emelyanova

    LTTK CTV, Oct 4, 2019
    Replies:
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    520
    LTTK CTV
    Oct 4, 2019
  65. LTTK CTV

    Geometric construction of reciprocal conjugations - Kean Dean and Floor van Lamoen

    LTTK CTV, Oct 4, 2019
    Replies:
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    387
    LTTK CTV
    Oct 4, 2019
  66. LTTK CTV

    The Simson cubic - Jean-Pierre Ehrmann and Bernard Gibert

    LTTK CTV, Oct 4, 2019
    Replies:
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    394
    LTTK CTV
    Oct 4, 2019
  67. LTTK CTV

    Multiplying and dividing curves by points - Clark Kimberling

    LTTK CTV, Oct 4, 2019
    Replies:
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    397
    LTTK CTV
    Oct 4, 2019
  68. LTTK CTV

    Some properties of the Lemoine point - Alexei Myakishev

    LTTK CTV, Oct 4, 2019
    Replies:
    0
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    682
    LTTK CTV
    Oct 4, 2019
  69. LTTK CTV

    Pedal triangles and their shadows - Antreas P. Hatzipolakis and Paul Yiu

    LTTK CTV, Oct 4, 2019
    Replies:
    0
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    357
    LTTK CTV
    Oct 4, 2019
  70. LTTK CTV

    The Gergonne problem - Nikolaos Dergiades

    LTTK CTV, Oct 4, 2019
    Replies:
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    360
    LTTK CTV
    Oct 4, 2019
  71. LTTK CTV

    Some remarkable concurrences - Bruce Shawyer

    LTTK CTV, Oct 4, 2019
    Replies:
    0
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    383
    LTTK CTV
    Oct 4, 2019
  72. LTTK CTV

    Concurrency of four Euler lines - Antreas P. Hatzipolakis, Floor van Lamoen, Barry Wolk, and Paul Yiu

    LTTK CTV, Oct 4, 2019
    Replies:
    0
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    379
    LTTK CTV
    Oct 4, 2019
  73. LTTK CTV

    A Morley configuration - Jean-Pierre Ehrmann and Bernard Gibert

    LTTK CTV, Oct 4, 2019
    Replies:
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    386
    LTTK CTV
    Oct 4, 2019
  74. LTTK CTV

    The Malfatti problem - Oene Bottema

    LTTK CTV, Oct 4, 2019
    Replies:
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    378
    LTTK CTV
    Oct 4, 2019
  75. LTTK CTV

    The isogonal tripolar conic - Cyril Parry

    LTTK CTV, Oct 4, 2019
    Replies:
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    362
    LTTK CTV
    Oct 4, 2019
  76. LTTK CTV

    Equilateral triangles intercepted by oriented parallelians - Sabrina Bier

    LTTK CTV, Oct 4, 2019
    Replies:
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    356
    LTTK CTV
    Oct 4, 2019
  77. LTTK CTV

    Heron triangles with a Gergonne-cevian-and-median perspective - K. R. S. Sastry

    LTTK CTV, Sep 25, 2019
    Replies:
    0
    Views:
    610
    LTTK CTV
    Sep 25, 2019
  78. LTTK CTV

    Perspective poristic triangles - Edward Brisse

    LTTK CTV, Sep 25, 2019
    Replies:
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    379
    LTTK CTV
    Sep 25, 2019
  79. LTTK CTV

    Another proof of the Erdos-Mordell theorem - Hojoo Lee

    LTTK CTV, Sep 25, 2019
    Replies:
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    409
    LTTK CTV
    Sep 25, 2019
  80. LTTK CTV

    Friendship among triangle centers - Floor van Lamoen

    LTTK CTV, Sep 25, 2019
    Replies:
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    Views:
    382
    LTTK CTV
    Sep 25, 2019
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