- Geogebra MaterialExterior Angles of PolygonsArea of a Circle - Wedge/Sector DemonstrationDudeney's puzzle + lesson planUnit Circle and Sine GraphCircumference of CirclesUnit Circle and Tangent GraphLinear ProgrammingUnit Circle and Cosine GraphSlopes of Perpendicular LinesCut Triangles into Rectangles & Dudeney's Puzzle GeneralizedChinese Match Puzzles 1 (8 puzzles)Chinese Match Puzzles 2 (7 puzzles)Largest area enclosed by 16 matchesMatrix and Linear TransformationIncircle of a triangleCircumcircle of a triangle (Soft Construction)Constructing Quadrilaterals by Four Sides (2014)Ambiguity of SSAArea of ParallelogramsDiscovering Pythagoras' Theorem by AreaDrawing Rhombus on the GridThe touches of y=a^x and y = log{a} xGeometry and Operation of a SextantWho Gets the ChargerInverse of a Function (graphical and numerical)Understanding Graphing Polynomials through GeogebraExponential FunctionsStadium Screen Viewing AngleCircle Geometry - Intersecting ChordsGirl in the MirrorFurther Transformations of Cosine FunctionsFurther Transformations of Sine FunctionsSine Transformations: Graph, Equation, TableTransformations of FunctionsTrig Inverse FunctionsDefining Trigonometric RatiosDouble Reflection of an objectEquations of a circle - Self DiscoveryRotating a Triangle Around a Coordinate AxisArea of CirclesVertex Form of ParabolaAmbiguous Case InvestigationCircumcenterVisual Proof of Pythagorean TheoremParallel Parking optimization (US customary units)Area Under the CurveUsing Riemann Sums to Estimate AreaTrapezoidal area approximations 2Simpsons RuleDissecting a triangular prism into 3 equal-volume pyramidsAA SimilarityNine point circle
