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Hula Hoop Shadow
Author:
John Golden
Topic:
Circle
Inspired by an excellent video from Malke Rosenfeld of the shadow of a spinning hula hoop. Is it a parabola?
GeoGebra
New Resources
alg2_05_05_01_applet_exp_2_flvs
Dissections by Guillermo Bautista
Exploring Simple Loci 探究簡單軌跡
Explore the invariant lines of matrix {{-2,5},{6,-9}}
Poorly Drawn Parallelograms
Discover Resources
Kaleidoscope
Elementary Math (Sec 1 to 4) Applets
slope intercept equations
AAS Congruence
Segment Addition Postulate
Discover Topics
Cuboid
Confidence Interval
Cube
Percentages
Complex Numbers