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\begin{document}

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\section*{Catriona Agg&#39;s puzzles 2018}

\hypertarget{catriona_aggs_geometry_puzzles_from_2018}{}\section*{{Catriona Agg's Geometry Puzzles from 2018}}\label{catriona_aggs_geometry_puzzles_from_2018}

\begin{enumerate}%
\item [[two rectangles in a semi-circle]] \emph{Dec 31, 2018}

[[TwoRectanglesinaSemiCircle\_small.png:pic]]


\item [[divided hexagon iii]] \emph{Dec 30, 2018}

[[DividedHexagonIII\_small.png:pic]]


\item [[circles around a triangle]] \emph{Dec 16, 2018}

[[CirclesAroundaTriangle\_small.png:pic]]


\item [[rectangles stacked in a semi-circle]] \emph{Dec 12, 2018}

[[RectanglesStackedinaSemiCircle\_small.png:pic]]


\item [[two circles, two squares]] \emph{Dec 11, 2018}

[[TwoCirclesTwoSquares\_small.png:pic]]


\item [[subdivided square]] \emph{Dec 5, 2018}

[[SubdividedSquare\_small.png:pic]]


\item [[chords dividing a triangle into five]] \emph{Dec 3, 2018}

[[ChordsDividingaTriangleintoFive\_small.png:pic]]


\item [[three rectangles as a triangle]] \emph{Dec 1, 2018}

[[ThreeRectanglesasaTriangle\_small.png:pic]]


\item [[partitioned square]] \emph{Nov 28, 2018}

[[PartitionedSquare\_small.png:pic]]


\item [[two squares overlapping a semi-circle]] \emph{Nov 26, 2018}

[[TwoSquaresOverlappingaSemiCircle\_small.png:pic]]


\item [[five triangles in a rectangle]] \emph{Nov 25, 2018}

[[FiveTrianglesinaRectangle\_small.png:pic]]


\item [[nested circles and a triangle]] \emph{Nov 24, 2018}

[[NestedCirclesandaTriangle\_small.png:pic]]


\item [[square in a triangle in a square]] \emph{Nov 23, 2018}

[[SquareinaTriangleinaSquare\_small.png:pic]]


\item [[quarter circles in a rectangle]] \emph{Nov 22, 2018}

[[QuarterCirclesinaRectangle\_small.png:pic]]


\item [[semi-circles in a quarter circle]] \emph{Nov 21, 2018}

[[SemiCirclesinaQuarterCircle\_small.png:pic]]


\item [[three squares on a line]] \emph{Nov 19, 2018}

[[ThreeSquaresonaLine\_small.png:pic]]


\item [[nested circles and polygons]] \emph{Nov 18, 2018}

[[NestedCirclesandPolygons\_small.png:pic]]


\item [[semi-circle and tangents in a square]] \emph{Nov 17, 2018}

[[SemiCircleandTangentsinaSquare\_small.png:pic]]


\item [[equilateral triangle in a hexagon]] \emph{Nov 17, 2018}

[[EquilateralTriangleinaHexagon\_small.png:pic]]


\item [[three regular hexagons]] \emph{Nov 14, 2018}

[[ThreeRegularHexagons\_small.png:pic]]


\item [[triangles in a semi-circle]] \emph{Nov 13, 2018}

[[TrianglesinaSemiCircle\_small.png:pic]]


\item [[equilateral triangles in a square]] \emph{Nov 12, 2018}

[[EquilateralTrianglesinaSquare\_small.png:pic]]


\item [[three aligned triangles]] \emph{Nov 11, 2018}

[[ThreeAlignedTriangles\_small.png:pic]]


\item [[crossed hexagon]] \emph{Nov 10, 2018}

[[CrossedHexagon\_small.png:pic]]


\item [[square in a semi-circle in a square]] \emph{Nov 8, 2018}

[[SquareinaSemiCircleinaSquare\_small.png:pic]]


\item [[two equilateral triangles in a semi-circle]] \emph{Nov 7, 2018}

[[TwoEquilateralTrianglesinaSemiCircle\_small.png:pic]]


\item [[three squares in a circle]] \emph{Nov 5, 2018}

[[ThreeSquaresinaCircle\_small.png:pic]]


\item [[square in a circle in a quarter circle in a square]] \emph{Nov 4, 2018}

[[SquareinaCircleinaQuarterCircleinaSquare\_small.png:pic]]


\item [[triangle in a circle in a quarter circle in a square]] \emph{Nov 4, 2018}

[[TriangleCircleQuarterCircleSquare\_small.png:pic]]


\item [[arcs inside a triangle]] \emph{Nov 2, 2018}

[[ArcsInsideaTriangle\_small.png:pic]]


\item [[quadrilateral from two squares in a square]] \emph{Oct 30, 2018}

[[QuadrilateralfromTwoSquaresinaSquare\_small.png:pic]]


\item [[triangle centres and square corners]] \emph{Oct 29, 2018}

[[TriangleCentresandSquareCorners\_small.png:pic]]


\item [[hexagon and concentric circles]] \emph{Oct 28, 2018}

[[HexagonandConcentricCircles\_small.png:pic]]


\item [[chord and annulus]] \emph{Oct 27, 2018}

[[ChordandAnnulus\_small.png:pic]]


\item [[dissected hexagon]] \emph{Oct 26, 2018}

[[DissectedHexagon\_small.png:pic]]


\item [[circles in rhombii sequal]] \emph{Oct 26, 2018}

[[CirclesinRhombiiSequal\_small.png:pic]]


\item [[circles in triangle and rhombus]] \emph{Oct 25, 2018}

[[CirclesinTriangleandRhombus\_small.png:pic]]


\item [[circles resting on triangles]] \emph{Oct 24, 2018}

[[CirclesRestingonTriangles\_small.png:pic]]


\item [[arbelos]] \emph{Oct 23, 2018}

[[Arbelos\_small.png:pic]]


\item [[four circles in a triangle in a circle]] \emph{Oct 22, 2018}

[[FourCirclesinaTriangleinaCircle\_small.png:pic]]


\item [[triangles with a parallelogram]] \emph{Oct 21, 2018}

[[TriangleswithaParallelogram\_small.png:pic]]


\item [[three squares in a square]] \emph{Oct 18, 2018}

[[ThreeSquaresinaSquare\_small.png:pic]]


\item [[two circles in an equilateral triangle]] \emph{Oct 17, 2018}

[[TwoCirclesinanEquilateralTriangle\_small.png:pic]]


\item [[semi-circles in a square]] \emph{Oct 15, 2018}

[[SemiCirclesinaSquare\_small.png:pic]]


\item [[five rectangles in a square]] \emph{Oct 14, 2018}

[[FiveRectanglesinaSquare\_small.png:pic]]


\item [[five overlapping circles]] \emph{Oct 11, 2018}

[[FiveOverlappingCircles\_small.png:pic]]


\item [[four regular polygons]] \emph{Oct 8, 2018}

[[FourRegularPolygons\_small.png:pic]]


\item [[four squares around a quadrilateral]] \emph{Oct 7, 2018}

[[FourSquaresAroundaQuadrilateral\_small.png:pic]]


\item [[two perpendicular equilateral triangles]] \emph{Oct 6, 2018}

[[TwoPerpendicularEquilateralTriangles\_small.png:pic]]


\item [[nested circles and polygons ii]] \emph{Oct 5, 2018}

[[NestedCirclesandPolygonsII\_small.png:pic]]


\item [[spiralling semi-circles]] \emph{Oct 3, 2018}

[[SpirallingSemiCircles\_small.png:pic]]


\item [[five decreasing squares]] \emph{Oct 1, 2018}

[[FiveDecreasingSquares\_small.png:pic]]


\item [[triangle and semi-circle in a circle]] \emph{Sep 29, 2018}

[[TriangleandSemiCircleinaCircle\_small.png:pic]]


\item [[subdivided parallelogram]] \emph{Sep 27, 2018}

[[SubdividedParallelogram\_small.png:pic]]


\item [[triangle in four rectangles]] \emph{Sep 26, 2018}

[[TriangleinFourRectangles\_small.png:pic]]


\item [[circle in a trapezium]] \emph{Sep 24, 2018}

[[CircleinaTrapezium\_small.png:pic]]


\item [[subdivided triangle]] \emph{Sep 19, 2018}

[[SubdividedTriangle\_small.png:pic]]


\item [[two circles inside a square]] \emph{Sep 17, 2018}

[[TwoCirclesInsideaSquare\_small.png:pic]]


\item [[concentric semi-circles]] \emph{Sep 16, 2018}

[[ConcentricSemiCircles\_small.png:pic]]


\item [[shaded spikes in a hexagon]] \emph{Sep 14, 2018}

[[ShadedSpikesinaHexagon\_small.png:pic]]


\item [[squares in an octagon]] \emph{Sep 11, 2018}

[[SquaresinanOctagon\_small.png:pic]]


\item [[four squares in a big square]] \emph{Sep 9, 2018}

[[FourSquaresinaBigSquare\_small.png:pic]]


\item [[stacked boxes in circles in squares]] \emph{Sep 8, 2018}

[[StackedBoxesinCirclesinSquares\_small.png:pic]]


\item [[four stacked squares in a circle in a square]] \emph{Sep 8, 2018}

[[FourStackedSquaresinaCircleinaSquare\_small.png:pic]]


\item [[overlapping square and circle]] \emph{Sep 6, 2018}

[[OverlappingSquareandCircle\_small.png:pic]]


\item [[two circles inscribed in triangles in a semi-circle]] \emph{Sep 3, 2018}

[[TwoCirclesInscribedinTrianglesinaSemiCircle\_small.png:pic]]


\item [[arcs in a circle]] \emph{Sep 1, 2018}

[[ArcsinaCircle\_small.png:pic]]


\item [[six squares in a hexagon]] \emph{Aug 31, 2018}

[[SixSquaresinaHexagon\_small.png:pic]]


\item [[four equilateral triangles round a square]] \emph{Aug 30, 2018}

[[FourEquilateralTranglesRoundaSquare\_small.png:pic]]


\item [[two triangles in a rectangle]] \emph{Aug 29, 2018}

[[TwoTrianglesinaRectangle\_small.png:pic]]


\item [[two overlapping squares iii]] \emph{Aug 28, 2018}

[[TwoOverlappingSquaresIII\_small.png:pic]]


\item [[two isosceles triangles]] \emph{Aug 28, 2018}

[[TwoIsoscelesTriangles\_small.png:pic]]


\item [[four isosceles triangles in a circle]] \emph{Aug 26, 2018}

[[FourIsoscelesTrianglesinaCircle\_small.png:pic]]


\item [[two octagons and two squares]] \emph{Aug 25, 2018}

[[TwoOctagonsandTwoSquares\_small.png:pic]]


\item [[hexagon in a star in a hexagon]] \emph{Aug 24, 2018}

[[HexagoninaStarinaHexagon\_small.png:pic]]


\item [[stacked hexagons]] \emph{Aug 23, 2018}

[[StackedHexagons\_small.png:pic]]


\item [[a square, triangle, and circle in a square]] \emph{Aug 22, 2018}

[[ASquareTriangleandCircleinaSquare\_small.png:pic]]


\item [[region of an octagon]] \emph{Aug 21, 2018}

[[RegionofanOctagon\_small.png:pic]]


\item [[semi-circle in a square]] \emph{Aug 20, 2018}

[[SemiCircleinaSquare\_small.png:pic]]


\item [[polygons with equal perimeter]] \emph{Aug 19, 2018}

[[PolygonswithEqualPerimeter\_small.png:pic]]


\item [[stacked shapes]] \emph{Aug 19, 2018}

[[StackedShapes\_small.png:pic]]


\item [[four squares overlapping a circle]] \emph{Aug 17, 2018}

[[FourSquaresOverlappingaCircle\_small.png:pic]]


\item [[triangle in circle in triangle in semi-circle]] \emph{Aug 15, 2018}

[[TriangleinCircleinTriangleinSemiCircle\_small.png:pic]]


\item [[bell-ringing braids]] \emph{Aug 14, 2018}

[[BellRingingBraids\_small.png:pic]]


\item [[four equilateral triangles]] \emph{Aug 13, 2018}

[[FourEquilateralTriangles\_small.jpg:pic]]


\item [[three squares and two equilateral triangles]] \emph{Aug 13, 2018}

[[ThreeSquaresandTwoEquilateralTriangles\_small.png:pic]]


\item [[zig-zag triangles]] \emph{Aug 12, 2018}

[[ZigzagTriangles\_small.png:pic]]


\item [[squares meeting in a circle]] \emph{Aug 12, 2018}

[[SquaresMeetinginaCircle\_small.png:pic]]


\item [[four aligned squares]] \emph{Aug 10, 2018}

[[FourAlignedSquares\_small.png:pic]]


\item [[three aligned squares]] \emph{Aug 9, 2018}

[[ThreeAlignedSquares\_small.png:pic]]


\item [[lengths in a crossed trapezium]] \emph{Aug 9, 2018}

[[LengthsinaCrossedTrapezium\_small.png:pic]]


\item [[overlapping squares]] \emph{Aug 8, 2018}

[[OverlappingSquares\_small.png:pic]]


\item [[toppled square]] \emph{Aug 7, 2018}

[[ToppledSquare\_small.png:pic]]


\item [[two rectangles overlapping a circle]] \emph{Aug 2, 2018}

[[TwoRectanglesOverlappingaCircle\_small.png:pic]]


\item [[subdivided circles]] \emph{May 21, 2018}

[[SubdividedCircles\_small.png:pic]]



\end{enumerate}


\end{document}