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\begin{document}

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\section*{Catriona Agg&#39;s puzzles 2020}

\hypertarget{catriona_aggs_puzzles_from_2020}{}\section*{{Catriona Agg's Puzzles from 2020}}\label{catriona_aggs_puzzles_from_2020}

\begin{enumerate}%
\item [[four triangles in a square]] \emph{Dec 31, 2020}

[[FourTrianglesinaSquare\_small.png:pic]]


\item [[zig-zag inside a rectangle]] \emph{Dec 30, 2020}

[[ZigzagInsideaRectangle\_small.png:pic]]


\item [[five squares across a square]] \emph{Dec 23, 2020}

[[FiveSquaresAcrossaSquare\_small.png:pic]]


\item [[two squares and a semi-circle]] \emph{Dec 13, 2020}

[[TwoSquaresandaSemiCircle\_small.png:pic]]


\item [[two circles in a square ii]] \emph{Oct 31, 2020}

[[TwoCirclesinaSquareII\_small.png:pic]]


\item [[triangles formed from rectangles]] \emph{Oct 29, 2020}

[[TrianglesFormedfromRectangles\_small.png:pic]]


\item [[three triangles in a circle in a triangle]] \emph{Oct 24, 2020}

[[ThreeTrianglesinaCircleinaTriangle\_small.png:pic]]


\item [[two quarter circles in a semi-circle]] \emph{Aug 31, 2020}

[[TwoQuarterCirclesinaSemiCircle\_small.png:pic]]


\item [[circle inside a triangle]] \emph{Aug 28, 2020}

[[CircleInsideaTriangle\_small.png:pic]]


\item [[similar rectangles]] \emph{Aug 26, 2020}

[[SimilarRectangles\_small.png:pic]]


\item [[two semi-circles in a circle]] \emph{Aug 21, 2020}

[[TwoSemiCirclesinaCircle\_small.png:pic]]


\item [[semi-circle and quarter circle in a square]] \emph{Aug 17, 2020}

[[SemiCircleandQuarterCircleinaSquare\_small.png:pic]]


\item [[multiple semi-circles in a circle]] \emph{Aug 15, 2020}

[[MultipleSemiCirclesinaCircle\_small.png:pic]]


\item [[four squares iv]] \emph{Aug 14, 2020}

[[FourSquaresIV\_small.png:pic]]


\item [[triangle over two rectangles]] \emph{Aug 7, 2020}

[[TriangleOverTwoRectangles\_small.png:pic]]


\item [[subdivided decagon]] \emph{Jul 30, 2020}

[[SubdividedDecagon\_small.png:pic]]


\item [[two congruent rectangles and a semi-circle]] \emph{Jul 29, 2020}

[[TwoCongruentRectanglesandaSemiCircle\_small.png:pic]]


\item [[a rectangle in a square]] \emph{Jul 26, 2020}

[[ARectangleinaSquare\_small.png:pic]]


\item [[two half-squares and a circle]] \emph{Jul 25, 2020}

[[TwoHalfSquaresandaCircle\_small.png:pic]]


\item [[three congruent rectangles iii]] \emph{Jul 23, 2020}

[[ThreeCongruentRectanglesIII\_small.png:pic]]


\item [[Squares and a Semi-Circle]] \emph{Jul 22, 2020}

[[SquaresandaSemiCircle\_small.png:pic]]


\item [[semi-circle in a square in a quarter circle]] \emph{Jul 19, 2020}

[[SemiCircleinaSquareinaQuarterCircle\_small.png:pic]]


\item [[two triangles and three concentric semi-circles]] \emph{Jul 18, 2020}

[[TwoTrianglesandThreeConcentricSemiCircles\_small.png:pic]]


\item [[five congruent rectangles]] \emph{Jul 15, 2020}

[[FiveCongruentRectangles\_small.png:pic]]


\item [[three squares iv]] \emph{Jul 12, 202}

[[ThreeSquaresIV\_small.png:pic]]


\item [[five rectangles tiling a square]] \emph{Jul 11, 2020}

[[FiveRectanglesTilingaSquare\_small.png:pic]]


\item [[rectangle overlapping a circle]] \emph{Jul 5, 2020}

[[RectangleOverlappingaCircle\_small.png:pic]]


\item [[swirling semi-circles]] \emph{Jun 14, 2020}

[[SwirlingSemiCircles\_small.png:pic]]


\item [[hexagon in a quarter circle]] \emph{May 31, 2020}

[[HexagoninaQuarterCircle\_small.png:pic]]


\item [[six semi-circles inside a hexagon]] \emph{May 30, 2020}

[[SixSemiCirclesInsideaHexagon\_small.png:pic]]


\item [[four quarter circles]] \emph{May 29, 2020}

[[FourQuarterCircles\_small.png:pic]]


\item [[two overlapping triangles and a circle]] \emph{May 28, 2020}

[[TwoOverlappingTrianglesandaCircle\_small.png:pic]]


\item [[two squares diagonally inside a rectangle]] \emph{May 26, 2020}

[[TwoSquaresDiagonallyInsideaRectangle\_small.png:pic]]


\item [[two circles and two semi-circles]] \emph{May 25, 2020}

[[TwoCirclesandTwoSemiCircles\_small.png:pic]]


\item [[two tilted squares]] \emph{May 23, 2020}

[[TwoTiltedSquares\_small.png:pic]]


\item [[a circle and two semi-circles in two hexagons]] \emph{May 14, 2020}

[[ACircleandTwoSemiCirclesinTwoHexagons\_small.png:pic]]


\item [[four squares overlapping a rectangle]] \emph{May 9, 2020}

[[FourSquaresOverlappingaRectangle\_small.png:pic]]


\item [[two semi-circles and a triangle]] \emph{May 8, 2020}

[[TwoSemiCirclesandaTriangle\_small.png:pic]]


\item [[a square and a hexagon]] \emph{May 5, 2020}

[[ASquareandaHexagon\_small.png:pic]]


\item [[five circles in a square]] \emph{May 2, 2020}

[[FiveCirclesinaSquare\_small.png:pic]]


\item [[two quarter circles in a rectangle in a semi-circle]] \emph{Apr 30, 2020}

[[TwoQuarterCirclesinaRectangleinaSemiCircle\_small.png:pic]]


\item [[four squares iii]] \emph{Apr 28, 2020}

[[FourSquaresIII\_small.png:pic]]


\item [[four squares ii]] \emph{Apr 26, 2020}

[[FourSquaresII\_small.png:pic]]


\item [[two circles inside an equilateral triangle]] \emph{Apr 25, 2020}

[[TwoCirclesInsideanEquilateralTriangle\_small.png:pic]]


\item [[three congruent rectangles ii]] \emph{Apr 24, 2020}

[[ThreeCongruentRectanglesII\_small.png:pic]]


\item [[four congruent squares inside a larger square]] \emph{Apr 23, 2020}

[[FourCongruentSquaresInsideaLargerSquare\_small.png:pic]]


\item [[two semi-circles and an equilateral triangle]] \emph{Apr 22, 2020}

[[TwoSemiCirclesandanEquilateralTriangle\_small.png:pic]]


\item [[two quarter circles and a semi-circle]] \emph{Apr 21, 2020}

[[TwoQuarterCirclesandaSemiCircle\_small.png:pic]]


\item [[three stacked squares]] \emph{Apr 19, 2020}

[[ThreeStackedSquares\_small.png:pic]]


\item [[two circles in a square]] \emph{Apr 18, 2020}

[[TwoCirclesinaSquare\_small.png:pic]]


\item [[three overlapping rectangles ii]] \emph{Apr 17, 2020}

[[ThreeOverlappingRectanglesII\_small.png:pic]]


\item [[semi-circle splitting a triangle]] \emph{Apr 16, 2020}

[[SemiCircleSplittingaTriangle\_small.png:pic]]


\item [[two semi-circles diagonally across a square]] \emph{Apr 15, 2020}

[[TwoSemiCirclesDiagonallyAcrossaSquare\_small.png:pic]]


\item [[two neighbouring rectangles]] \emph{Apr 13, 2020}

[[TwoNeighbouringRectangles\_small.png:pic]]


\item [[two overlapping semi-circles]] \emph{Apr 12, 2020}

[[TwoOverlappingSemiCircles\_small.png:pic]]


\item [[nested semi-circles]] \emph{Apr 11, 2020}

[[NestedSemiCircles\_small.png:pic]]


\item [[two circles in a triangle ii]] \emph{Apr 10, 2020}

[[TwoCirclesinaTriangleII\_small.png:pic]]


\item [[tangential hexagon and circle]] \emph{Apr 9, 2020}

[[TangentialHexagonandCircle\_small.png:pic]]


\item [[three overlapping rectangles]] \emph{Apr 8, 2020}

[[ThreeOverlappingRectangles\_small.png:pic]]


\item [[three circles forming a triangle]] \emph{Apr 7, 2020}

[[ThreeCirclesFormingaTriangle\_small.png:pic]]


\item [[four squares in a circle]] \emph{Apr 6, 2020}

[[FourSquaresinaCircle\_small.png:pic]]


\item [[three equal area rectangles]] \emph{Apr 5, 2020}

[[ThreeEqualAreaRectangles\_small.png:pic]]


\item [[six equal area rectangles]] \emph{Apr 4, 2020}

[[SixEqualAreaRectangles\_small.png:pic]]


\item [[angle formed by three squares]] \emph{Apr 2, 2020}

[[AngleFormedbyThreeSquares\_small.png:pic]]


\item [[quadrilateral splitting a semi-circle]] \emph{Apr 1, 2020}

[[QuadrilateralSplittingaSemiCircle\_small.png:pic]]


\item [[two regular hexagons ii]] \emph{Mar 28, 2020}

[[TwoRegularHexagonsII\_small.png:pic]]


\item [[three squares in a circle ii]] \emph{Mar 21, 2020}

[[ThreeSquaresinaCircleII\_small.png:pic]]


\item [[rectangle across a rectangle]] \emph{Mar 16, 2020}

[[RectangleAcrossaSquare\_small.png:pic]]


\item [[two squares and an equilateral triangle]] \emph{Mar 14, 2020}

[[TwoSquaresandanEquilateralTriangle\_small.png:pic]]


\item [[quarter circles in a rectangle in a circle]] \emph{Mar 7, 2020}

[[QuarterCirclesinaRectangleinaCircle\_small.png:pic]]


\item [[nested isosceles triangles]] \emph{Mar 5, 2020}

[[NestedIsoscelesTriangles\_small.png:pic]]


\item [[five circles in a rectangle in a semi-circle]] \emph{Feb 29, 2020}

[[FiveCirclesinaRectangleinaSemiCircle\_small.png:pic]]


\item [[two semi-circles inside a rectangle]] \emph{Feb 23, 2020}

[[TwoSemiCirclesInsideaRectangle\_small.png:pic]]


\item [[two squares inside an equilateral triangle]] \emph{Feb 22, 2020}

[[TwoSquaresInsideanEquilateralTriangle\_small.png:pic]]


\item [[tilted rectangle in a square]] \emph{Feb 20, 2020}

[[TiltedRectangleinaSquare\_small.png:pic]]


\item [[circle in a quarter circle]] \emph{Feb 18, 2020}

[[CircleinaQuarterCircle\_small.png:pic]]


\item [[three semi-circles]] \emph{Feb 16, 2020}

[[ThreeSemiCircles\_small.png:pic]]


\item [[a square and a rectangle overlapping]] \emph{Feb 14, 2020}

[[ASquareandaRectangleOverlapping\_small.png:pic]]


\item [[three circles in a hexagon in a circle]] \emph{Feb 10, 2020}

[[ThreeCirclesinaHexagoninaCircle\_small.png:pic]]


\item [[three circles]] \emph{Feb 8, 2020}

[[ThreeCircles\_small.png:pic]]


\item [[three squares in a triangle]] \emph{Feb 4, 2020}

[[ThreeSquaresinaTriangle\_small.png:pic]]


\item [[four squares]] \emph{Feb 1, 2020}

[[FourSquares\_small.png:pic]]


\item [[arcs in a semi-circle]] \emph{Jan 30, 2020}

[[ArcsinaSemiCircle\_small.png:pic]]


\item [[three isoscelese triangles inside a triangle]] \emph{Jan 23, 2020}

[[ThreeIsosceleseTrianglesInsideaTriangle\_small.png:pic]]


\item [[square and rectangle overlapping in a semi-circle]] \emph{Jan 16, 2020}

[[SquareandRectangleOverlappinginaSemiCircle\_small.png:pic]]


\item [[three stacked squares and a fourth square]] \emph{Jan 12, 2020}

[[ThreeStackedSquaresandaFourthSquare\_small.png:pic]]


\item [[parallelogram area]] \emph{Jan 7, 2020}

[[ParallelogramArea\_small.png:pic]]


\item [[three squares]] \emph{Jan 4, 2020}

[[ThreeSquares\_small.png:pic]]


\item [[parallelogram in a rectangle]] \emph{Jan 1, 2020}

[[ParallelograminaRectangle\_small.png:pic]]



\end{enumerate}


\end{document}