Curve of Pursuit

Five ants chasing each other. Move the big white dots!

Addition formula for cosine

Change the angles to see the cases in all four quadrants.

Binomial and normal distribution

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Archimedes Pi

Non-Cartesian cars

Change t to let the cars race!

Quadrilaterals

Dynamic demonstration of various quadrilaterals. Drag the filled points!

Interactive GeoGebra logo

Drag the points!