In order to get rid of the on
we must take the square root on the other side
hence getting rid of on
take the square root
Do you understand better now?
Take a look at this(specifically example 1) http://regentsprep.org/regents/Math/fpyth/Pythag.htm
They have arranged it difference but it is the same.
I completely understand. I went to this site to get a better understanding:
http://www.nutshellmath.com/textbook...triangles.html