# How can the Pythagorean Theorem be proved using a mean proportional in a 2-column format?

##### 1 Answer

Nov 27, 2015

Let use the figure below which represents a right triangle

Using the Leg Rule for the leg labeled "a", we have that

Using the Leg Rule for the leg labeled "b", we have that

Now if we add (1)+(2) we get

Hence this completes the proof of the pythagorean theorem.