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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
Next
Constructing Quadrilaterals by Four Sides (2014)
New Resources
A coffee cup and a doughnut
Prime and Composite Numbers
A1_ Linear and exponential models 278299
Range and Domain
Domain and Range
Discover Resources
Cobweb linear approximations around equilibria
Week 4 - trapezoidal lune
Geogebra App Investigations
Fraction Stretch 0 - Blog
day 108
Discover Topics
Scatter Plot
Trigonometry
Cone
Poisson Distribution
General Quadrilateral
