- favorite
- 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
