pythagoreas theorem states [tex] opp^{2} [/tex] + [tex] adj^{2} [/tex] = [tex] hyp^{2} [/tex].
[tex] x^{2} [/tex]= [tex] 6^{2} [/tex] + [tex] 8^{2} [/tex].
[tex] x^{2} [/tex] = 100. x=10