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The modified construction
Author:
Steve Phelps
The same construction, but with lines so things like point D can be dragged a bit.
GeoGebra
New Resources
探究由平行線和截線所成的角
What is an Isogonal Conjugate?
alg2_05_05_04_applet_exp_fxn_flvs
Droste effect
Exploring the Derivative of an Exponential Function
Discover Resources
Angle in Semi Circle
Problema di Erone
Arbelos Chain
Simson Line of a Triangle
Gradient of line (angle of inclination)
Discover Topics
Planes
Conditional Probability
Differential Equation
Trigonometry
Step Functions