How to draw a regular hexagon (or decagon) using a ruler and a compass
Try it out in your copybook or maybe start by drawing a perfect square using this fantastic geometry drawing website. Here’s another drawing program. You can install this app from the Google Chrome store.
More Geometry-Pythagaros’ Theorem
In a right-angled triangle, the square on the hypotanuse (the long side) is equal in area to the sum of the squares on the other two sides (of the triangle).