Question

sliva used the steps below to prove the Pythagorean theorem

Answer 1

Short Answer A is the bad guy. <<<<

The line should read 
The large square area = the 4 triangles + the inner square.
(a + b)^2 = c^2 + 4 ( 1/2 * ab)
(a + b)^2 = c^2 + 2 ab