An environment for exploring the properties of small groups.
Discover a handy way to describe reorderings and solve our anagram in the process.
Balancing interactivity with springs and weights.
On the 3D grid a strange (and deadly) animal is lurking. Using the tracking system can you locate this creature as quickly as possible?
We have four rods of equal lengths hinged at their endpoints to form a rhombus ABCD. Keeping AB fixed we allow CD to take all possible positions in the plane. What is the locus (or path) of the point. . . .
Medieval stonemasons used a method to construct octagons using ruler and compasses... Is the octagon regular? Proof please.
The opposite vertices of a square have coordinates (a,b) and (c,d). What are the coordinates of the other vertices?