Graphing Complex Numbers
The points A and B are already plotted for you. You will notice that they have complex numbers for coordinates. There are check boxes to add A and B, subtract A and B, and multiply points A and B.
Hyperbolic Kit for Poincaré Disc
nrich star patterns
Descartes' method for finding the tangent line to an ellipse
Jack Geary GeoGebra
Visual proofs of the sums of infinite geometric series, r<1의 복사본
Example LF.FORM.2 Point-Slope Composition