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51M04 - Geometry :: Real and complex geometry :: Elementary problems in Euclidean geometries

  1. \operatorname{arc tan} with two arguments owned by matte
  2. angle of view of a line segment owned by pahio
  3. angles of an isosceles triangle owned by Wkbj79
  4. antiprism owned by Wkbj79
  5. area of a spherical triangle owned by Mathprof
  6. area of spherical calotte by means of chord owned by pahio
  7. area of spherical zone owned by pahio
  8. base and height of triangle owned by pahio
  9. centre of mass of polygon owned by pahio
  10. circle has one center owned by Wkbj79
  11. circular segment owned by pahio
  12. circumferential angle is half the corresponding central angle owned by rm50
  13. common point of triangle medians owned by pahio
  14. cone in \mathbb{R}^3 owned by pahio
  15. conformality of stereographic projection owned by pahio
  16. construction of fourth proportional owned by pahio
  17. converse of isosceles triangle theorem owned by Wkbj79
  18. convex angle owned by pahio
  19. corollary of Morley's theorem owned by drini
  20. corresponding angles in transversal cutting owned by Wkbj79
  21. cosines law owned by drini
  22. cylinder owned by stevecheng
  23. cylindroid owned by PrimeFan
  24. Dehn's theorem owned by paolini
  25. determining from angles that a triangle is isosceles owned by Wkbj79
  26. developable surface owned by pahio
  27. diametral points owned by pahio
  28. dihedral angle owned by pahio
  29. equation of tangent of circle owned by pahio
  30. exact trigonometry tables owned by stevecheng
  31. explementary owned by pahio
  32. generatrices of hyperbolic paraboloid owned by pahio
  33. generatrices of one-sheeted hyperboloid owned by pahio
  34. harmonic division owned by pahio
  35. harmonic mean in trapezoid owned by pahio
  36. Hausdorff paradox owned by GrafZahl
  37. Heron's principle owned by pahio
  38. intercept theorem owned by pahio
  39. isosceles triangle theorem owned by Wkbj79
  40. lengths of triangle medians owned by pahio
  41. level curve owned by pahio
  42. median of trapezoid owned by pahio
  43. Napoleon's theorem owned by drini
  44. normal of plane owned by pahio
  45. opposing angles in a cyclic quadrilateral are supplementary owned by rm50
  46. parallel and perpendicular planes owned by pahio
  47. parallelism of line and plane owned by pahio
  48. parallelism of two planes owned by pahio
  49. parallelogram theorems owned by pahio
  50. pivot theorem owned by drini
  51. Plücker's conoid owned by Mravinci
  52. pons asinorum owned by Wkbj79
  53. proof of cosines law owned by pahio
  54. proof of Dehn's theorem owned by paolini
  55. proof of Hausdorff paradox owned by GrafZahl
  56. proof of Morley's theorem owned by mathcam
  57. proof of parallelogram theorems owned by rm50
  58. proof of pivot theorem owned by pbruin
  59. proof of uniqueness of center of a circle owned by CWoo
  60. radian owned by PrimeFan
  61. regular decagon inscribed in circle owned by pahio
  62. regular polygon and circles owned by pahio
  63. ruled surface owned by pahio
  64. sine of angle of triangle owned by pahio
  65. spherical trigonometry owned by fernsanz
  66. supplementary angles owned by pahio
  67. surface of revolution owned by pahio
  68. Sylvester's theorem owned by bbukh
  69. theorems of Euclid owned by rspuzio
  70. tilt curve owned by pahio
  71. Torricelli's trumpet owned by pahio
  72. triangle mid-segment theorem owned by pahio
  73. truncated cone owned by pahio
  74. vector projection owned by pahio
  75. volume of spherical cap and spherical sector owned by pahio

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