Notes
Catriona Agg's puzzles 2019

Catriona Agg’s Geometry Puzzles from 2019

  1. three circles in a rectangle Dec 31, 2019

    Three Circles in a Rectangle

  2. two semi-circles inside a semi-circle Dec 29, 2019

    Two Semi-Circles Inside a Semi-Circle

  3. two squares Dec 28, 2019

    Two Squares

  4. pentagram in a circle Dec 24, 2019

    Pentagram in a Circle

  5. rectangle quartered by semi-circles Dec 23, 2019

    Rectangle Quartered by Semi-Circles

  6. chord dividing a triangle into two Dec 22, 2019

    Chord Dividing a Triangle into Two

  7. two pentagons Dec 20, 2019

    Two Pentagons

  8. two circles in a rectangle Dec 17, 2019

    Two Circles in a Rectangle

  9. angle formed by three rectangles Dec 14, 2019

    Angle Formed by Three Rectangles

  10. five semi-circles around a rectangle Dec 11, 2019

    Five Semi-Circles Around a Rectangle

  11. three equal angles in a rectangle Dec 7, 2019

    Three Equal Angles in a Rectangle

  12. a square, a circle, and a rectangle Dec 4, 2019

    A Square, A Circle, and a Rectangle

  13. three right-angled triangles Nov 30, 2019

    Three Right-Angled Triangles

  14. two rectangles overlapping a square Nov 24, 2019

    Two Rectangles Overlapping a Square

  15. areas in a crossed trapezium Nov 20, 2019

    Areas in a Crossed Trapezium

  16. seven hexagons Nov 18, 2019

    Seven Hexagons

  17. a pattern of squares Nov 17, 2019

    A Pattern of Squares

  18. three hexagons and a rectangle Nov 15, 2019

    Three Hexagons and a Rectangle

  19. six circles inside a circle inside a square Nov 9, 2019

    Six Circles Inside a Circle Inside a Square

  20. stacked squares inside two squares Nov 7, 2019

    Stacked Squares Inside Two Squares

  21. three squares inside a triangle Oct 30, 2019

    Three Squares Inside a Triangle

  22. three congruent triangles Oct 29, 2019

    Three Congruent Triangles

  23. two semi-circles inside a semi-circle ii Oct 27, 2019

    Two Semi-Circles Inside a Semi-Circle II

  24. multiple semi-circles Oct 25, 2019

    Multiple Semi-Circles

  25. two congruent rectangles in a square Oct 24, 2019

    Two Congruent Rectangles in a Square

  26. three circles in a rectangle ii Oct 19, 2019

    Three Circles in a Rectangle II

  27. overlapping triangles in a circle Oct 13, 2019

    Overlapping Triangles in a Circle

  28. diagonal in a square Oct 11, 2019

    Diagonal in a Square

  29. seven circles Oct 5, 2019

    Seven Circles

  30. angles in two hexagons Sep 28, 2019

    Angles in Two Hexagons

  31. three overlapping squares Sep 19, 2019

    Three Overlapping Squares

  32. four squares and a semi-circle Sep 7, 2019

    Four Squares and a Semi-Circle

  33. two overlapping hexagons and a rectangle Sep 2, 2019

    Two Overlapping Hexagons and a Rectangle

  34. two rectangles of equal area Aug 31, 2019

    Two Rectangles of Equal Area

  35. three squares overlapping a semi-circle Aug 29, 2019

    Three Squares Overlapping a Semi-Circle

  36. two hexagons and a square Aug 28, 2019

    Two Hexagons and a Square

  37. four hexagons Aug 26, 2019

    Four Hexagons

  38. two squares in a semi-circle Aug 24, 2019

    Two Squares in a Semi-Circle

  39. three squares in a semi-circle Aug 23, 2019

    Three Squares in a Semi-Circle

  40. three congruent squares overlapping a square Aug 22, 2019

    Three Congruent Squares Overlapping a Square

  41. three triangles in a square Aug 20, 2019

    Three Triangles in a Square

  42. trisected hexagon Aug 19, 2019

    Trisected Hexagon

  43. two congruent quadrilaterals and a rectangle Aug 16, 2019

    Two Congruent Quadrilaterals and a Rectangle

  44. semi-circle in a square Aug 14, 2019

    Semi-Circle in a Square

  45. circle in pentagon in semi-circle Aug 11, 2019

    Circle In Pentagon in Semi-Circle

  46. rectangles in concentric rings Aug 9, 2019

    Rectangles in Concentric Rings

  47. three regular hexagons Aug 8, 2019

    Three Regular Hexagons

  48. one rectangle inside another with semi-circles Aug 5, 2019

    One Rectangle Inside Another With Semi-Circles

  49. two rectangles and a semi-circle Aug 3, 2019

    Two Rectangles and a Semi-Circle

  50. three equilateral triangles and a semi-circle Aug 2, 2019

    Three Equilateral Triangles and a Semi-Circle

  51. three circles in a semi-circle Aug 1, 2019

    Three Circles in a Semi-Circle

  52. upside-down semi-circles in a semi-circle Jul 30, 2019

    Upside-Down Semi-Circles in a Semi-Circle

  53. stacked triangles Jul 29, 2019

    Stacked Triangles

  54. triangles in a dodecagon Jul 27, 2019

    Triangles in a Dodecagon

  55. angle formed by two squares ii Jul 26, 2019

    Angle Formed by Two Squares II

  56. three parallel semi-circles Jul 24, 2019

    Three Parallel Semi-Circles

  57. semi-circle in a right-angled triangle Jul 23, 2019

    Semi-Circle in a Right-Angled Triangle

  58. three congruent squares in a rectangle Jul 22, 2019

    Three Congruent Squares in a Rectangle

  59. three hexagons in a trapezium Jul 20, 2019

    Three Hexagons in a Trapezium

  60. stack of congruent rectangles Jun 28, 2019

    Stack of Congruent Rectangles

  61. angles in a circle Jun 27, 2019

    Angles in a Circle

  62. striped dodecagon Jun 24, 2019

    Striped Dodecagon

  63. two squares overlapping a third square Jun 15, 2019

    Two Squares Overlapping a Third Square

  64. three squares and a semi-circle Jun 7, 2019

    Three Squares and a Semi-Circle

  65. three congruent rectangles ii Jun 4, 2019

    Three Congruent Rectangles II

  66. rectangle, circle, and triangle Jun 1, 2019

    Rectangle, Circle, and Triangle

  67. two regular hexagons May 30, 2019

    Two Regular Hexagons

  68. angle in a circle and semi-circle May 28, 2019

    Angle in a Circle and Semi-Circle

  69. circle and two squares May 26, 2019

    Circle and Two Squares

  70. divided hexagon May 25, 2019

    Divided Hexagon

  71. two overlapping squares May 20, 2019

    Two Overlapping Squares

  72. two squares in a triangle May 19, 2019

    Two Squares in a Triangle

  73. a semi-circle and quarter circle in a square May 17, 2019

    A Semi-Circle and Quarter Circle in a Square

  74. overlapping triangle and hexagon May 14, 2019

    Overlapping Triangle and Hexagon

  75. overlapping triangle and rectangle May 10, 2019

    Overlapping Triangle and Rectangle

  76. divided hexagon ii May 8, 2019

    Divided Hexagon II

  77. semi-circle between two quarter circles May 6, 2019

    Semi-Circle Between Two Quarter Circles

  78. two squares and two equilateral triangles ii May 5, 2019

    Two Squares and Two Equilateral Triangles II

  79. two squares and two equilateral triangles iii May 5, 2019

    Two Squares and Two Equilateral Triangles III

  80. angles in two circles May 3, 2019

    Angles in Two Circles

  81. square with midpoints May 1, 2019

    Square with Midpoints

  82. angle formed by two squares Apr 28, 2019

    Angle Formed by Two Squares

  83. two circles inside two polygons inside a circle Apr 26, 2019

    Two Circles Inside Two Polygons Inside a Circle

  84. quartered hexagon Apr 24, 2019

    Quartered Hexagon

  85. two semi-circles in a square Apr 22, 2019

    Two Semi-Circles in a Square

  86. three semi-circles around a triangle Apr 20, 2019

    Three Semi-Circles Around a Triangle

  87. two overlapping squares ii Apr 18, 2019

    Two Overlapping Squares II

  88. two rectangles with diagonals Apr 17, 2019

    Two Rectangles with Diagonals

  89. two semi-circles and a rectangle Apr 16, 2019

    Two Semi-Circles and a Rectangle

  90. semi-circle on a hexagon Apr 14, 2019

    Semi-Circle on a Hexagon

  91. divided square Apr 12, 2019

    Divided Square

  92. three adjacent triangles Apr 10, 2019

    Three Adjacent Triangles

  93. triangle and circle inside square Apr 7, 2019

    Triangle and Circle Inside Square

  94. two squares on a triangle Apr 4, 2019

    Two Squares on a Triangle

  95. square, rectangle, and two semi-circles Apr 3, 2019

    Square, Rectangle, and Two Semi-Circles

  96. three triangles and a rectangle inside a circle Mar 30, 2019

    Three Triangles and a Rectangle Inside a Circle

  97. triangle inside a square Mar 26, 2019

    Triangle Inside a Square

  98. triangle inside circle and triangle Mar 20, 2019

    Triangle Inside Circle and Triangle

  99. circle in triangle in square Mar 17, 2019

    Circle in Triangle in Square

  100. quarter circles in a square in a circle Mar 16, 2019

    Quarter Circles in a Square in a Circle

  101. triangle overlapping a hexagon Mar 13, 2019

    Triangle Overlapping a Hexagon

  102. two circles in a triangle Mar 10, 2019

    Two Circles in a Triangle

  103. inverse star in a rectangle Mar 7, 2019

    Inverse Star in a Rectangle

  104. three overlapping circles Mar 3, 2019

    Three Overlapping Circles

  105. three tilted rectangles Mar 1, 2019

    Three Tilted Rectangles

  106. overlapping hexagons Feb 26, 2019

    Overlapping Hexagons

  107. square overlapping a quarter circle Feb 24, 2019

    Square Overlapping a Quarter Circle

  108. two hexagons in a rectangle Feb 23, 2019

    Two Hexagons in a Rectangle

  109. semi-circle in a circle Feb 22, 2019

    Semi-Circle in a Circle

  110. two triangles overlapping a rectangle Feb 21, 2019

    Two Triangles Overlapping a Rectangle

  111. square on an octagon Feb 19, 2019

    Square on an Octagon

  112. circle and semi-circle in triangle Feb 18, 2019

    Circle and Semi-Circle in Triangle

  113. overlapping triangles Feb 16, 2019

    Overlapping Triangles

  114. tilted rectangles Feb 13, 2019

    Tilted Rectangles

  115. triangle in semi-circle with square Feb 11, 2019

    Triangle in Semi-Circle with Square

  116. circles in overlapping triangles Feb 7, 2019

    Circles in Overlapping Triangles

  117. tilted triangles Feb 2, 2019

    Tilted Triangles

  118. two quarter circles in a square Jan 28, 2019

    Two Quarter Circles in a Square

  119. two squares and a rectangle in an octagon Jan 26, 2019

    Two Squares and a Rectangle in an Octagon

  120. square overlapping a circle Jan 25, 2019

    Square Overlapping a Circle

  121. six semi-circles in a circle Jan 21, 2019

    Six Semi-Circles in a Circle

  122. rectangle on a hexagon Jan 19, 2019

    Rectangle on a Hexagon

  123. two squares on a circle Jan 16, 2019

    Two Squares on a Circle

  124. pentagon with two semi-circles Jan 14, 2019

    Pentagon with two Semi-Circles

  125. striped hexagon Jan 13, 2019

    Striped Hexagon

  126. circle in a hexagon in a semi-circle Jan 11, 2019

    Circle in a Hexagon in a Semi-Circle

  127. overlapping rectangle and semi-circle Jan 5, 2019

    Overlapping Rectangle and Semi-Circle