The triangle inside the three squares shows the proof of the Pythagorean Theorem
Area of one triangle is 25 sq units, so one side = 5
Area of second triangle is 144 sq units, so the side = 12
Area of third triangle is 169sq units, so one side = 13
Therefore three side of the triangle are, 5, 12 and 13
proof of the Pythagorean Theorem
Base = 12
Height = 5
Hypotenuse = 13
5^2 + 12^2 = 25 +169 =13^2
