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Author:
Arthur Lee

  • Constructing Quadrilaterals by Four Sides (2014)

  • Slopes of Perpendicular Lines

  • Exterior Angles of Polygons

  • AQR Section 17: Dot Plot and Box-and-Whisker Plot

  • Box & Whisker vs. Histogram

  • Multiplying 3 Factors

  • Area of a Circle - Wedge/Sector Demonstration

  • Graphing Linear Equations in 2 Unknowns

  • Circumcircle of a triangle (Soft Construction)

  • Trigonometric Ratios: Sine 三角比:正弦

  • A single equation for a smiley face

  • Polygonal numbers

  • Polygonal Number 多邊形數

  • Factorization - Visual illustration of divisor pairs

  • An Isosceles Mystery

  • Animation: Expanding square

  • The Flower

  • Missing Square Puzzle

  • kgkgkgmGrowth of Facebook.com

  • Discrete SIR infectious disease model versus time

  • Moss Egg by Robert Dixon

  • Discovering Pythagoras' Theorem by Area

  • Egiptian Triangle by Paper Folding(6)

  • Playing Card Dealer

  • Squares in a Rectangle

  • Curve Stitching: making a parabola from straight lines.

  • Constant width shapes

  • Shapes of constant width

  • Square and Triangle Pattern

  • Exterior Angle Sum Demostrated

  • Transformation - Rotation

  • Wallpaper Groups

  • Shonk's Reinvention

  • Sector to Cone Lateral Area split screen

  • Curved Surface Area of Cones (Parametric Curved Surface)

  • Cylinder Illusion

  • Just for fun

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Constructing Quadrilaterals by Four Sides (2014)

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