We play with Euclid

It’s an excellent interactive guide for schoolchildren, but for techies who have graduated from school, it’s an opportunity to return to childhood for a short while.

Remember these tasks "with the help of a compass and a ruler, build ..."? Here you can practice in such constructions.

20 levels are built on the principle of "from simple to complex." Previous achievements (for example, the ability to build an equilateral triangle) at the next levels are already available in the form of tools.

Everything went through, though at the last level I had to tinker a bit with the tangents to the circles.