Notes
Catriona Agg's puzzles 2018

Catriona Agg’s Geometry Puzzles from 2018

  1. two rectangles in a semi-circle Dec 31, 2018

    Two Rectangles in a Semi-Circle

  2. divided hexagon iii Dec 30, 2018

    Divided Hexagon III

  3. circles around a triangle Dec 16, 2018

    Circles Around a Triangle

  4. rectangles stacked in a semi-circle Dec 12, 2018

    Rectangles Stacked in a Semi-Circle

  5. two circles, two squares Dec 11, 2018

    Two Circles, Two Squares

  6. subdivided square Dec 5, 2018

    Subdivided Square

  7. chords dividing a triangle into five Dec 3, 2018

    Chords Dividing a Triangle into Five

  8. three rectangles as a triangle Dec 1, 2018

    Three Rectangles as a Triangle

  9. partitioned square Nov 28, 2018

    Partitioned Square

  10. two squares overlapping a semi-circle Nov 26, 2018

    Two Squares Overlapping a Semi-Circle

  11. five triangles in a rectangle Nov 25, 2018

    Five Triangles in a Rectangle

  12. nested circles and a triangle Nov 24, 2018

    Nested Circles and a Triangle

  13. square in a triangle in a square Nov 23, 2018

    Square in a Triangle in a Square

  14. quarter circles in a rectangle Nov 22, 2018

    Quarter Circles in a Rectangle

  15. semi-circles in a quarter circle Nov 21, 2018

    Semi-Circles in a Quarter Circle

  16. three squares on a line Nov 19, 2018

    Three Squares on a Line

  17. nested circles and polygons Nov 18, 2018

    Nested Circles and Polygons

  18. semi-circle and tangents in a square Nov 17, 2018

    Semi-Circle and Tangents in a Square

  19. three regular hexagons ii Nov 14, 2018

    Three Regular Hexagons II

  20. triangles in a semi-circle Nov 13, 2018

    Triangles in a Semi-Circle

  21. equilateral triangles in a square Nov 12, 2018

    Equilateral Triangles in a Square

  22. three aligned triangles Nov 11, 2018

    Three Aligned Triangles

  23. crossed hexagon Nov 10, 2018

    Crossed Hexagon

  24. square in a semi-circle in a square Nov 8, 2018

    Square in a Semi-Circle in a Square

  25. two equilateral triangles in a semi-circle Nov 7, 2018

    Two Equilateral Triangles in a Semi-Circle

  26. three squares in a circle Nov 5, 2018

    Three Squares in a Circle

  27. square in a circle in a quarter circle in a square Nov 4, 2018

    Square in a Circle in a Quarter Circle in a Square

  28. arcs inside a triangle Nov 2, 2018

    Arcs Inside a Triangle

  29. quadrilateral from two squares in a square Oct 30, 2018

    Quadrilateral from Two Squares in a Square

  30. triangle centres and square corners Oct 29, 2018

    Triangle Centres and Square Corners

  31. hexagon and concentric circles Oct 28, 2018

    Hexagon and Concentric Circles

  32. chord and annulus Oct 27, 2018

    Chord and Annulus

  33. dissected hexagon Oct 26, 2018

    Dissected Hexagon

  34. circles in rhombii sequal Oct 26, 2018

    Circles in Rhombii Sequal

  35. circles in triangle and rhombus Oct 25, 2018

    Circles in Triangle and Rhombus

  36. circles resting on triangles Oct 24, 2018

    Circles Resting on Triangles

  37. arbelos Oct 23, 2018

    Arbelos

  38. four circles in a triangle in a circle Oct 22, 2018

    Four Circles in a Triangle in a Circle

  39. triangles with a parallelogram Oct 21, 2018

    Triangles with a Parallelogram

  40. three squares in a square Oct 18, 2018

    Three Squares in a Square

  41. two circles in an equilateral triangle Oct 17, 2018

    Two Circles in an Equilateral Triangle

  42. semi-circles in a square Oct 15, 2018

    Semi-Circles in a Square

  43. five rectangles in a square Oct 14, 2018

    Five Rectangles in a Square

  44. five overlapping circles Oct 11, 2018

    Five Overlapping Circles

  45. four regular polygons Oct 8, 2018

    Four Regular Polygons

  46. four squares around a quadrilateral Oct 7, 2018

    Four Squares Around a Quadrilateral

  47. two perpendicular equilateral triangles Oct 6, 2018

    Two Perpendicular Equilateral Triangles

  48. nested circles and polygons ii Oct 5, 2018

    Nested Circles and Polygons II

  49. spiralling semi-circles Oct 3, 2018

    Spiralling Semi-Circles

  50. five decreasing squares Oct 1, 2018

    Five Decreasing Squares

  51. triangle and semi-circle in a circle Sep 29, 2018

    Triangle and Semi-Circle in a Circle

  52. subdivided parallelogram Sep 27, 2018

    Subdivided Parallelogram

  53. triangle in four rectangles Sep 26, 2018

    Triangle in Four Rectangles

  54. circle in a trapezium Sep 24, 2018

    Circle in a Trapezium

  55. subdivided triangle Sep 19, 2018

    Subdivided Triangle

  56. two circles inside a square Sep 17, 2018

    Two Circles Inside a Square

  57. concentric semi-circles Sep 16, 2018

    Concentric Semi-Circles

  58. shaded spikes in a hexagon Sep 14, 2018

    Shaded Spikes in a Hexagon

  59. squares in an octagon Sep 11, 2018

    Squares in an Octagon

  60. four squares in a big square Sep 9, 2018

    Four Squares in a Big Square

  61. four stacked squares in a circle in a square Sep 8, 2018

    Four Stacked Squares in a Circle in a Square

  62. stacked boxes in circles in squares Sep 8, 2018

    Stacked Boxes in Circles in Squares

  63. overlapping square and circle Sep 6, 2018

    Overlapping Square and Circle

  64. two circles inscribed in triangles in a semi-circle Sep 3, 2018

    Two Circles Inscribed in Triangles in a Semi-Circle

  65. arcs in a circle Sep 1, 2018

    Arcs in a Circle

  66. six squares in a hexagon Aug 31, 2018

    Six Squares in a Hexagon

  67. four equilateral triangles round a square Aug 30, 2018

    Four Equilateral Trangles Round a Square

  68. two overlapping squares iii Aug 28, 2018

    Two Overlapping Squares III

  69. two isosceles triangles Aug 28, 2018

    Two Isosceles Triangles

  70. four isosceles triangles in a circle Aug 26, 2018

    Four Isosceles Triangles in a Circle

  71. hexagon in a star in a hexagon Aug 24, 2018

    Hexagon in a Star in a Hexagon

  72. stacked hexagons Aug 23, 2018

    Stacked Hexagons

  73. a square, triangle, and circle in a square Aug 22, 2018

    A Square, Triangle, and Circle in a Square

  74. region of an octagon Aug 21, 2018

    Region of an Octagon

  75. semi-circle in a square Aug 20, 2018

    Semi-Circle in a Square

  76. polygons with equal perimeter Aug 19, 2018

    Polygons with Equal Perimeter

  77. stacked shapes Aug 19, 2018

    Stacked Shapes

  78. four squares overlapping a circle Aug 17, 2018

    Four Squares Overlapping a Circle

  79. triangle in circle in triangle in semi-circle Aug 15, 2018

    Triangle in Circle in Triangle in Semi-Circle

  80. bell-ringing braids Aug 14, 2018

    Bell-Ringing Braids

  81. four equilateral triangles Aug 13, 2018

    FourEquilateralTriangles_small.jpg

  82. two squares and two equilateral triangles Aug 13, 2018

    Two Squares and Two Equilateral Triangles

  83. squares meeting in a circle Aug 12, 2018

    Squares Meeting in a Circle

  84. zig-zag triangles Aug 12, 2018

    Zig-zag Triangles

  85. four aligned squares Aug 10, 2018

    Four Aligned Squares

  86. lengths in a crossed trapezium Aug 9, 2018

    Lengths in a Crossed Trapezium

  87. three aligned squares Aug 9, 2018

    Three Aligned Squares

  88. overlapping squares Aug 8, 2018

    Overlapping Squares

  89. toppled square Aug 7, 2018

    Toppled Square

  90. two rectangles overlapping a circle Aug 2, 2018

    Two Rectangles Overlapping a Circle

  91. subdivided circles May 21, 2018

    Subdivided Circles

  92. two circles inside a triangle __

    Two Circles Inside a Triangle

  93. two overlapping congruent squares __

    Two Overlapping Congruent Squares

  94. rectangle and hexagon __

    Rectangle and Hexagon

  95. angle in two overlapping squares __

    Angle in Two Overlapping Squares

  96. three congruent rectangles __

    Three Congruent Rectangles

  97. three squares and an equilateral triangle __

    Three Squares and an Equilateral Triangle