# Catriona Agg's Geometry Puzzles from 2018 1. [[two rectangles in a semi-circle]] _Dec 31, 2018_ +-- {.miniimage} [[TwoRectanglesinaSemiCircle_small.png:pic]] =-- 1. [[divided hexagon iii]] _Dec 30, 2018_ +-- {.miniimage} [[DividedHexagonIII_small.png:pic]] =-- 1. [[circles around a triangle]] _Dec 16, 2018_ +-- {.miniimage} [[CirclesAroundaTriangle_small.png:pic]] =-- 1. [[rectangles stacked in a semi-circle]] _Dec 12, 2018_ +-- {.miniimage} [[RectanglesStackedinaSemiCircle_small.png:pic]] =-- 1. [[two circles, two squares]] _Dec 11, 2018_ +-- {.miniimage} [[TwoCirclesTwoSquares_small.png:pic]] =-- 1. [[subdivided square]] _Dec 5, 2018_ +-- {.miniimage} [[SubdividedSquare_small.png:pic]] =-- 1. [[chords dividing a triangle into five]] _Dec 3, 2018_ +-- {.miniimage} [[ChordsDividingaTriangleintoFive_small.png:pic]] =-- 1. [[three rectangles as a triangle]] _Dec 1, 2018_ +-- {.miniimage} [[ThreeRectanglesasaTriangle_small.png:pic]] =-- 1. [[partitioned square]] _Nov 28, 2018_ +-- {.miniimage} [[PartitionedSquare_small.png:pic]] =-- 1. [[two squares overlapping a semi-circle]] _Nov 26, 2018_ +-- {.miniimage} [[TwoSquaresOverlappingaSemiCircle_small.png:pic]] =-- 1. [[five triangles in a rectangle]] _Nov 25, 2018_ +-- {.miniimage} [[FiveTrianglesinaRectangle_small.png:pic]] =-- 1. [[nested circles and a triangle]] _Nov 24, 2018_ +-- {.miniimage} [[NestedCirclesandaTriangle_small.png:pic]] =-- 1. [[square in a triangle in a square]] _Nov 23, 2018_ +-- {.miniimage} [[SquareinaTriangleinaSquare_small.png:pic]] =-- 1. [[quarter circles in a rectangle]] _Nov 22, 2018_ +-- {.miniimage} [[QuarterCirclesinaRectangle_small.png:pic]] =-- 1. [[semi-circles in a quarter circle]] _Nov 21, 2018_ +-- {.miniimage} [[SemiCirclesinaQuarterCircle_small.png:pic]] =-- 1. [[three squares on a line]] _Nov 19, 2018_ +-- {.miniimage} [[ThreeSquaresonaLine_small.png:pic]] =-- 1. [[nested circles and polygons]] _Nov 18, 2018_ +-- {.miniimage} [[NestedCirclesandPolygons_small.png:pic]] =-- 1. [[semi-circle and tangents in a square]] _Nov 17, 2018_ +-- {.miniimage} [[SemiCircleandTangentsinaSquare_small.png:pic]] =-- 1. [[equilateral triangle in a hexagon]] _Nov 17, 2018_ +-- {.miniimage} [[EquilateralTriangleinaHexagon_small.png:pic]] =-- 1. [[three regular hexagons]] _Nov 14, 2018_ +-- {.miniimage} [[ThreeRegularHexagons_small.png:pic]] =-- 1. [[triangles in a semi-circle]] _Nov 13, 2018_ +-- {.miniimage} [[TrianglesinaSemiCircle_small.png:pic]] =-- 1. [[equilateral triangles in a square]] _Nov 12, 2018_ +-- {.miniimage} [[EquilateralTrianglesinaSquare_small.png:pic]] =-- 1. [[three aligned triangles]] _Nov 11, 2018_ +-- {.miniimage} [[ThreeAlignedTriangles_small.png:pic]] =-- 1. [[crossed hexagon]] _Nov 10, 2018_ +-- {.miniimage} [[CrossedHexagon_small.png:pic]] =-- 1. [[square in a semi-circle in a square]] _Nov 8, 2018_ +-- {.miniimage} [[SquareinaSemiCircleinaSquare_small.png:pic]] =-- 1. [[two equilateral triangles in a semi-circle]] _Nov 7, 2018_ +-- {.miniimage} [[TwoEquilateralTrianglesinaSemiCircle_small.png:pic]] =-- 1. [[three squares in a circle]] _Nov 5, 2018_ +-- {.miniimage} [[ThreeSquaresinaCircle_small.png:pic]] =-- 1. [[square in a circle in a quarter circle in a square]] _Nov 4, 2018_ +-- {.miniimage} [[SquareinaCircleinaQuarterCircleinaSquare_small.png:pic]] =-- 1. [[triangle in a circle in a quarter circle in a square]] _Nov 4, 2018_ +-- {.miniimage} [[TriangleCircleQuarterCircleSquare_small.png:pic]] =-- 1. [[arcs inside a triangle]] _Nov 2, 2018_ +-- {.miniimage} [[ArcsInsideaTriangle_small.png:pic]] =-- 1. [[quadrilateral from two squares in a square]] _Oct 30, 2018_ +-- {.miniimage} [[QuadrilateralfromTwoSquaresinaSquare_small.png:pic]] =-- 1. [[triangle centres and square corners]] _Oct 29, 2018_ +-- {.miniimage} [[TriangleCentresandSquareCorners_small.png:pic]] =-- 1. [[hexagon and concentric circles]] _Oct 28, 2018_ +-- {.miniimage} [[HexagonandConcentricCircles_small.png:pic]] =-- 1. [[chord and annulus]] _Oct 27, 2018_ +-- {.miniimage} [[ChordandAnnulus_small.png:pic]] =-- 1. [[dissected hexagon]] _Oct 26, 2018_ +-- {.miniimage} [[DissectedHexagon_small.png:pic]] =-- 1. [[circles in rhombii sequal]] _Oct 26, 2018_ +-- {.miniimage} [[CirclesinRhombiiSequal_small.png:pic]] =-- 1. [[circles in triangle and rhombus]] _Oct 25, 2018_ +-- {.miniimage} [[CirclesinTriangleandRhombus_small.png:pic]] =-- 1. [[circles resting on triangles]] _Oct 24, 2018_ +-- {.miniimage} [[CirclesRestingonTriangles_small.png:pic]] =-- 1. [[arbelos]] _Oct 23, 2018_ +-- {.miniimage} [[Arbelos_small.png:pic]] =-- 1. [[four circles in a triangle in a circle]] _Oct 22, 2018_ +-- {.miniimage} [[FourCirclesinaTriangleinaCircle_small.png:pic]] =-- 1. [[triangles with a parallelogram]] _Oct 21, 2018_ +-- {.miniimage} [[TriangleswithaParallelogram_small.png:pic]] =-- 1. [[three squares in a square]] _Oct 18, 2018_ +-- {.miniimage} [[ThreeSquaresinaSquare_small.png:pic]] =-- 1. [[two circles in an equilateral triangle]] _Oct 17, 2018_ +-- {.miniimage} [[TwoCirclesinanEquilateralTriangle_small.png:pic]] =-- 1. [[semi-circles in a square]] _Oct 15, 2018_ +-- {.miniimage} [[SemiCirclesinaSquare_small.png:pic]] =-- 1. [[five rectangles in a square]] _Oct 14, 2018_ +-- {.miniimage} [[FiveRectanglesinaSquare_small.png:pic]] =-- 1. [[five overlapping circles]] _Oct 11, 2018_ +-- {.miniimage} [[FiveOverlappingCircles_small.png:pic]] =-- 1. [[four regular polygons]] _Oct 8, 2018_ +-- {.miniimage} [[FourRegularPolygons_small.png:pic]] =-- 1. [[four squares around a quadrilateral]] _Oct 7, 2018_ +-- {.miniimage} [[FourSquaresAroundaQuadrilateral_small.png:pic]] =-- 1. [[two perpendicular equilateral triangles]] _Oct 6, 2018_ +-- {.miniimage} [[TwoPerpendicularEquilateralTriangles_small.png:pic]] =-- 1. [[nested circles and polygons ii]] _Oct 5, 2018_ +-- {.miniimage} [[NestedCirclesandPolygonsII_small.png:pic]] =-- 1. [[spiralling semi-circles]] _Oct 3, 2018_ +-- {.miniimage} [[SpirallingSemiCircles_small.png:pic]] =-- 1. [[five decreasing squares]] _Oct 1, 2018_ +-- {.miniimage} [[FiveDecreasingSquares_small.png:pic]] =-- 1. [[triangle and semi-circle in a circle]] _Sep 29, 2018_ +-- {.miniimage} [[TriangleandSemiCircleinaCircle_small.png:pic]] =-- 1. [[subdivided parallelogram]] _Sep 27, 2018_ +-- {.miniimage} [[SubdividedParallelogram_small.png:pic]] =-- 1. [[triangle in four rectangles]] _Sep 26, 2018_ +-- {.miniimage} [[TriangleinFourRectangles_small.png:pic]] =-- 1. [[circle in a trapezium]] _Sep 24, 2018_ +-- {.miniimage} [[CircleinaTrapezium_small.png:pic]] =-- 1. [[subdivided triangle]] _Sep 19, 2018_ +-- {.miniimage} [[SubdividedTriangle_small.png:pic]] =-- 1. [[two circles inside a square]] _Sep 17, 2018_ +-- {.miniimage} [[TwoCirclesInsideaSquare_small.png:pic]] =-- 1. [[concentric semi-circles]] _Sep 16, 2018_ +-- {.miniimage} [[ConcentricSemiCircles_small.png:pic]] =-- 1. [[shaded spikes in a hexagon]] _Sep 14, 2018_ +-- {.miniimage} [[ShadedSpikesinaHexagon_small.png:pic]] =-- 1. [[squares in an octagon]] _Sep 11, 2018_ +-- {.miniimage} [[SquaresinanOctagon_small.png:pic]] =-- 1. [[four squares in a big square]] _Sep 9, 2018_ +-- {.miniimage} [[FourSquaresinaBigSquare_small.png:pic]] =-- 1. [[stacked boxes in circles in squares]] _Sep 8, 2018_ +-- {.miniimage} [[StackedBoxesinCirclesinSquares_small.png:pic]] =-- 1. [[four stacked squares in a circle in a square]] _Sep 8, 2018_ +-- {.miniimage} [[FourStackedSquaresinaCircleinaSquare_small.png:pic]] =-- 1. [[overlapping square and circle]] _Sep 6, 2018_ +-- {.miniimage} [[OverlappingSquareandCircle_small.png:pic]] =-- 1. [[two circles inscribed in triangles in a semi-circle]] _Sep 3, 2018_ +-- {.miniimage} [[TwoCirclesInscribedinTrianglesinaSemiCircle_small.png:pic]] =-- 1. [[arcs in a circle]] _Sep 1, 2018_ +-- {.miniimage} [[ArcsinaCircle_small.png:pic]] =-- 1. [[six squares in a hexagon]] _Aug 31, 2018_ +-- {.miniimage} [[SixSquaresinaHexagon_small.png:pic]] =-- 1. [[four equilateral triangles round a square]] _Aug 30, 2018_ +-- {.miniimage} [[FourEquilateralTranglesRoundaSquare_small.png:pic]] =-- 1. [[two triangles in a rectangle]] _Aug 29, 2018_ +-- {.miniimage} [[TwoTrianglesinaRectangle_small.png:pic]] =-- 1. [[two overlapping squares iii]] _Aug 28, 2018_ +-- {.miniimage} [[TwoOverlappingSquaresIII_small.png:pic]] =-- 1. [[two isosceles triangles]] _Aug 28, 2018_ +-- {.miniimage} [[TwoIsoscelesTriangles_small.png:pic]] =-- 1. [[four isosceles triangles in a circle]] _Aug 26, 2018_ +-- {.miniimage} [[FourIsoscelesTrianglesinaCircle_small.png:pic]] =-- 1. [[two octagons and two squares]] _Aug 25, 2018_ +-- {.miniimage} [[TwoOctagonsandTwoSquares_small.png:pic]] =-- 1. [[hexagon in a star in a hexagon]] _Aug 24, 2018_ +-- {.miniimage} [[HexagoninaStarinaHexagon_small.png:pic]] =-- 1. [[stacked hexagons]] _Aug 23, 2018_ +-- {.miniimage} [[StackedHexagons_small.png:pic]] =-- 1. [[a square, triangle, and circle in a square]] _Aug 22, 2018_ +-- {.miniimage} [[ASquareTriangleandCircleinaSquare_small.png:pic]] =-- 1. [[region of an octagon]] _Aug 21, 2018_ +-- {.miniimage} [[RegionofanOctagon_small.png:pic]] =-- 1. [[semi-circle in a square]] _Aug 20, 2018_ +-- {.miniimage} [[SemiCircleinaSquare_small.png:pic]] =-- 1. [[polygons with equal perimeter]] _Aug 19, 2018_ +-- {.miniimage} [[PolygonswithEqualPerimeter_small.png:pic]] =-- 1. [[stacked shapes]] _Aug 19, 2018_ +-- {.miniimage} [[StackedShapes_small.png:pic]] =-- 1. [[four squares overlapping a circle]] _Aug 17, 2018_ +-- {.miniimage} [[FourSquaresOverlappingaCircle_small.png:pic]] =-- 1. [[triangle in circle in triangle in semi-circle]] _Aug 15, 2018_ +-- {.miniimage} [[TriangleinCircleinTriangleinSemiCircle_small.png:pic]] =-- 1. [[bell-ringing braids]] _Aug 14, 2018_ +-- {.miniimage} [[BellRingingBraids_small.png:pic]] =-- 1. [[four equilateral triangles]] _Aug 13, 2018_ +-- {.miniimage} [[FourEquilateralTriangles_small.jpg:pic]] =-- 1. [[three squares and two equilateral triangles]] _Aug 13, 2018_ +-- {.miniimage} [[ThreeSquaresandTwoEquilateralTriangles_small.png:pic]] =-- 1. [[zig-zag triangles]] _Aug 12, 2018_ +-- {.miniimage} [[ZigzagTriangles_small.png:pic]] =-- 1. [[squares meeting in a circle]] _Aug 12, 2018_ +-- {.miniimage} [[SquaresMeetinginaCircle_small.png:pic]] =-- 1. [[four aligned squares]] _Aug 10, 2018_ +-- {.miniimage} [[FourAlignedSquares_small.png:pic]] =-- 1. [[three aligned squares]] _Aug 9, 2018_ +-- {.miniimage} [[ThreeAlignedSquares_small.png:pic]] =-- 1. [[lengths in a crossed trapezium]] _Aug 9, 2018_ +-- {.miniimage} [[LengthsinaCrossedTrapezium_small.png:pic]] =-- 1. [[overlapping squares]] _Aug 8, 2018_ +-- {.miniimage} [[OverlappingSquares_small.png:pic]] =-- 1. [[toppled square]] _Aug 7, 2018_ +-- {.miniimage} [[ToppledSquare_small.png:pic]] =-- 1. [[two rectangles overlapping a circle]] _Aug 2, 2018_ +-- {.miniimage} [[TwoRectanglesOverlappingaCircle_small.png:pic]] =-- 1. [[subdivided circles]] _May 21, 2018_ +-- {.miniimage} [[SubdividedCircles_small.png:pic]] =--