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Angle from centre to tangent is 90
Author:
Daniel Eggleton
GeoGebra
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"Compressed" Astroid as Envelope
Ellipse, Hyperbola and Circle as Envelopes
Pelecoid
Icosahedron
Rotating rings: Community Showcase
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ED331 Kite Maker
Equation of a straight line
Roller Coaster 1
MATT - Protractor
x,y->-x,y (reflection over y axis)
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Coordinates
Surface
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