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Parallel Lines
Author:
Dana Harrington
GeoGebra
New Resources
"Compressed" Astroid as Envelope
History of Maths - Work in progress
Ellipse as Envelope - Correspondence Method
Stairs (Optical Illusion)
Piano. Keyboard.
Discover Resources
L6 Portfolio (2)
Triangle - Midpoints
Linear Transformations
Catriona Shearer's Parallelogram Puzzle
Dy: Fixed Axis Rotation
Discover Topics
Hypothesis Testing
Arithmetic
Rotation
Polygons
Natural Numbers