Answer: x = 8
Step-by-step explanation: Use the Pythagoras theorem, [tex]a^2+b^2=c^2[/tex]. a^2 and b^2 could be any of the other sides, but [tex]c^2[/tex] has to be the hypotenuse (longest side), which in this case is 10.
=>[tex]a^2+b^2=c^2[/tex]
=>[tex]6^2+x^2=10^2\\x^2=10^2-6^2\\x^2=64\\\sqrt{x^2} =\sqrt{64} \\x=8[/tex]
