Resposta :

ArthurPDC
[tex]14^2=(5\sqrt3)^2+x^2\\\\ 196=75+x^2\\\\ x^2=121\\\\ x=\sqrt{121}\\\\ \boxed{x=11\;cm}[/tex]
carloswms2012
[tex]h^2=c^2+c^2\\14^2=(5\sqrt3)^2+c^2\\196=25*3+c^2\\196=75+c^2\\c^2=196-75\\c^2=121\\c=\sqrt{121}\\c=11cm[/tex]

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