Tessellation from squares
A tessellation based off squares. Drag points E and F to change the shape of the red polygon. Drag the sliders k, l, m on the left to rotate it, and then you can realize how the tessellation is formed.
Cube Cross Section
Given a function, trace the first and second derivative
Discovering the Pythagorean Theorem
testfileWed Oct 17 20:30:19 CEST 20180.046674271827526925