This post reminds me the visual explanation of pythagoras' theorem : http://www.mathsisfun.com/pythagoras.html http://www.mathsisfun.com/pythagoras.html Also,

This post reminds me the visual explanation of pythagoras' theorem : http://www.mathsisfun.com/pythagoras.html http://www.mathsisfun.com/pythagoras.html Also, the math language symbols are great for communicating easily and efficiently among us, but it's not the best materials for learning. Distinguish learning (with visual) and communicating (with language symbols) activity in math should help...