what is the pythagoras' if the value is 12cm 18cm and 8cm + ?cm

Thanks Civonamzuk,

It should  be noted that you have assumed that the unknown side is the hypotenuse.

This may not be the case :)

what is the pythagoras' if the value is 12cm 18cm and 8cm + ?cm

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a = 12cm,   b = 18cm   and   c = (8cm + Xcm)

             a² + b² = c²

            12² + 18² = c²                  

          144 + 324 = 468

            X = sqrt(468) - 8

            X = 13.63cm

I was aware of the fact that the unknown side could've been either the adjacent side, or the hypotenuse.