Random Walks in the Plane
From James Tanton @jamestanton on twitter. "I have a 25% chance of moving each direction N,S,E,W one step. After 12 moves how many steps will I be from start on average?"
Robot in coordonate 2D. Transformari de coordonate.
Rotation - With Trace
triangles with bisectors 11-9-17
Unit Circle to Trig Graphs
Visual proofs of the sums of infinite geometric series, r<1의 복사본
Baravelle's Spiral and Infinite Geometric Series의 복사본
Parallel Lines and Their Slopes (Discovery)