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Author:
Eric P. Olson
GeoGebra
New Resources
Parallelograms: Quick Investigation
Subtraction of Vectors
History of Maths - Work in progress
Exploring the Area of a Triangle
Ellipse, Hyperbola and Circle as Envelopes
Discover Resources
Koleso
Forum_36327_B_RecordingA_exor_B
Stretch and Shrink
Conditions for congruent triangles (RHS)
Adding Proper Fractions
Discover Topics
Median Value
Tangent Line or Tangent
Power Functions
Quadrilaterals
Geometric Mean