# Catriona Agg’s Geometry Puzzles from 2018

1. two rectangles in a semi-circle Dec 31, 2018 2. divided hexagon iii Dec 30, 2018 3. circles around a triangle Dec 16, 2018 4. rectangles stacked in a semi-circle Dec 12, 2018 5. two circles, two squares Dec 11, 2018 6. subdivided square Dec 5, 2018 7. chords dividing a triangle into five Dec 3, 2018 8. three rectangles as a triangle Dec 1, 2018 9. partitioned square Nov 28, 2018 10. two squares overlapping a semi-circle Nov 26, 2018 11. five triangles in a rectangle Nov 25, 2018 12. nested circles and a triangle Nov 24, 2018 13. square in a triangle in a square Nov 23, 2018 14. quarter circles in a rectangle Nov 22, 2018 15. semi-circles in a quarter circle Nov 21, 2018 16. three squares on a line Nov 19, 2018 17. nested circles and polygons Nov 18, 2018 18. semi-circle and tangents in a square Nov 17, 2018 19. three regular hexagons ii Nov 14, 2018 20. triangles in a semi-circle Nov 13, 2018 21. equilateral triangles in a square Nov 12, 2018 22. three aligned triangles Nov 11, 2018 23. crossed hexagon Nov 10, 2018 24. square in a semi-circle in a square Nov 8, 2018 25. two equilateral triangles in a semi-circle Nov 7, 2018 26. three squares in a circle Nov 5, 2018 27. 28. arcs inside a triangle Nov 2, 2018 29. quadrilateral from two squares in a square Oct 30, 2018 30. triangle centres and square corners Oct 29, 2018 31. hexagon and concentric circles Oct 28, 2018 32. chord and annulus Oct 27, 2018 33. dissected hexagon Oct 26, 2018 34. circles in rhombii sequal Oct 26, 2018 35. circles in triangle and rhombus Oct 25, 2018 36. circles resting on triangles Oct 24, 2018 37. arbelos Oct 23, 2018 38. four circles in a triangle in a circle Oct 22, 2018 39. triangles with a parallelogram Oct 21, 2018 40. three squares in a square Oct 18, 2018 41. two circles in an equilateral triangle Oct 17, 2018 42. semi-circles in a square Oct 15, 2018 43. five rectangles in a square Oct 14, 2018 44. five overlapping circles Oct 11, 2018 45. four regular polygons Oct 8, 2018 46. four squares around a quadrilateral Oct 7, 2018 47. two perpendicular equilateral triangles Oct 6, 2018 48. nested circles and polygons ii Oct 5, 2018 49. spiralling semi-circles Oct 3, 2018 50. five decreasing squares Oct 1, 2018 51. triangle and semi-circle in a circle Sep 29, 2018 52. subdivided parallelogram Sep 27, 2018 53. triangle in four rectangles Sep 26, 2018 54. circle in a trapezium Sep 24, 2018 55. subdivided triangle Sep 19, 2018 56. two circles inside a square Sep 17, 2018 57. concentric semi-circles Sep 16, 2018 58. shaded spikes in a hexagon Sep 14, 2018 59. squares in an octagon Sep 11, 2018 60. four squares in a big square Sep 9, 2018 61. four stacked squares in a circle in a square Sep 8, 2018 62. stacked boxes in circles in squares Sep 8, 2018 63. overlapping square and circle Sep 6, 2018 64. 65. arcs in a circle Sep 1, 2018 66. six squares in a hexagon Aug 31, 2018 67. four equilateral triangles round a square Aug 30, 2018 68. two overlapping squares iii Aug 28, 2018 69. two isosceles triangles Aug 28, 2018 70. four isosceles triangles in a circle Aug 26, 2018 71. hexagon in a star in a hexagon Aug 24, 2018 72. stacked hexagons Aug 23, 2018 73. a square, triangle, and circle in a square Aug 22, 2018 74. region of an octagon Aug 21, 2018 75. semi-circle in a square Aug 20, 2018 76. polygons with equal perimeter Aug 19, 2018 77. stacked shapes Aug 19, 2018 78. four squares overlapping a circle Aug 17, 2018 79. triangle in circle in triangle in semi-circle Aug 15, 2018 80. bell-ringing braids Aug 14, 2018 81. four equilateral triangles Aug 13, 2018

FourEquilateralTriangles_small.jpg

82. two squares and two equilateral triangles Aug 13, 2018 83. squares meeting in a circle Aug 12, 2018 84. zig-zag triangles Aug 12, 2018 85. four aligned squares Aug 10, 2018 86. lengths in a crossed trapezium Aug 9, 2018 87. three aligned squares Aug 9, 2018 88. overlapping squares Aug 8, 2018 89. toppled square Aug 7, 2018 90. two rectangles overlapping a circle Aug 2, 2018 91. subdivided circles May 21, 2018 92. 93. 94. 95. 96. 97. 