Answer :

In the right angle triangle, hypotenuse is the longest side

In this case, (x+ 2) would be the longest side of the triangle

That would be given by Pythagoras theorem

x2 + (x-2)2 = (x+2)2

x2 + x2 + 4 - 4x = x2 +4 +2x

x2- 6x = 0

x( x-6) = 0

x = 0 or x= 6

Since the side cannot be zero

x =6

Hence, the hypotenuse = x= 8cm

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