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Angelique Errett
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Convex vs. Concave
Tim Brzezinski
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Polygon interior angle sum patterns.
Marie Mueller
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Proofs Without Words
Steve Phelps
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Transformations - 2. Rotation, Reflec…
Angelique Errett
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Transformations - 1. Translation
Angelique Errett
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Cores IV and V: Week 1 - Two tangents…
Angelique Errett
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Beginning Geogebra
Angelique Errett
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Activity 1.1: Points, Lines, and Planes
Angelique Errett
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Postulates
karen.handy
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Messing With Lisa
Tim Brzezinski
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Sum of angles in polygons
Duane Habecker
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Transformation - Translation
Lorena Mendoza
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Equivalent Ratios
Duane Habecker
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Poorly Drawn Quadrilaterals
Steve Phelps
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Convex quadrilaterals
Paulo Correia
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Gauss-Jordan 2x2 Elimination
Auston B Cron
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Angle Estimation Warmup
Andrew Knauft
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Number Pyramids
Jennifer Silverman
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Graph the Line
Steve Phelps
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Flip Flop
John Golden
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Guess My Rule (2013)
John Golden
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5-Piece Puzzle
Duane Habecker
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GeoGebra Pentominoes
Duane Habecker
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right triangle paradox
sonom
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AQR Section 17: Mean but Sensitive
Steve Phelps
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Secant Slope Calculator
Jake Binnema
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Exponential or Logistic Function that…
talljerome
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Growth of Facebook.com
Roy Wright
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Lower and Upper Sum of a Function
GeoGebra Materials Team
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One-Son Policy Simulation
Steve Phelps
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Pendulum Wave Machine (Simulation)
Michael Borcherds
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Hilbert curve
Thijs
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'Tangram' Puzzle 'Cat'
GeoGebra Translation Team German
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Moss Egg by Robert Dixon
Bill Lombard
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Spirograph-Epitrochoid Earth and Moon
Bill Lombard
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Inclined Plane with Two Masses and a …
Tom Walsh
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The Relationship Between Human Height…
Roy Wright
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Factorization - Visual illustration o…
Ethan Hall
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Kaleidoscope
Michael Borcherds
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Rotating a Triangle Around a Coordina…
Steve Phelps
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Area of a Circle - Wedge/Sector Demon…
Linda Fahlberg-Stojanovska
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Triangle Paradox (Missing square puzzle)
Michael Borcherds
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