Respostas

2014-03-28T14:58:51-03:00
 \frac{b}{4} = \frac{c}{2}

b+c=90
c=90-b

 \frac{b}{4} = \frac{90-b}{2}
2b=4(90-b)
2b=360-4b
2b+4b=360
6b=360
b= \frac{360}{6}
b=60

c=90-b
c=90-60
c=30
tem as opcao qual delas seria resposta?
letra C
2014-03-28T20:44:07-03:00