Connect fractions, ratio, percentages and equations.
Keep a chord fixed and move a triangle vertex.
Compare shapes and change their dimensions.
Split and combine areas with a common height.
Change dimensions. Connect rectangles, squares and triangles with quadratic expressions.
Connect coordinate changes to the distance between two points.
Grow a fair coin tree. Count outcomes and multiply along a path.
Connect velocity, gradient and signed area with movement.
Enable JavaScript to use the simulations.