Respostas

  • Usuário do Brainly
2014-09-02T17:19:57-03:00
AB=cateto=x
BC=cateto=120m
então será tg

tg30°= \frac{x}{120}

 \frac{ \sqrt{3} }{3} = \frac{x}{120}

3x=120 \sqrt{3}

x= \frac{120 \sqrt{3} }{3}

\fbox{$x=40 \sqrt{3} $} \fbox{$68m$}

ou 

40\times1,7




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