Pythagroas's Theorem Proof 01.
The proof are stated as follow:
area(AGF) + area(BDE) = area(AIJ) + area(BHJ)
=> 1/2 area(ACFG) + 1/2 area(BCDE) = 1/2 area(ABHI)
=> a^2 + b^2 = c^2.