Respostas

  • Usuário do Brainly
2014-03-05T12:45:17-03:00
sen \alpha =  \frac{C.o}{H}

Senb= \frac{x}{10}

 \frac{3}{5} = \frac{x}{10}

3.10=5x

30=5x

 \frac{30}{5}=x

x=6cm

O lado Ab tem 6cm