Respostas

2014-03-20T23:14:54-03:00
Acredito que seja b/4 (60/4 ) e c/2 ( 30/2) =>  60/4 = 30/2  ( 60/4 = 15 e 30/2 =15 ) para que b+c = 90
60 + 30 = 90
2014-03-20T23:47:39-03:00