Respostas

2014-07-03T01:52:49-03:00
Sabcde = Sabc + Saedf + Sfdc
DABC
(AC)2 = 40*40 + 38*38 - 2*40*38*cos60
(AC)2 = 1600 + 1444 - 2*1520*1/2 -----> 1524
AC = 39 m
FC = 39 − 25 = 14
FC = 14 m
Sabcde = 38*40*sen60°/2 + 30*25 + 14*30/2
Sabcde = 760*0,86+750+210 = 1613,60
35*1613,60 = 56 476 reais
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