Jawabanmu

2014-04-20T13:59:14+07:00
15. 4x-4+2x+7=180, 6x+3=180, 6x=177, x=29.5, CBD=2x+7, CBD=2×29.5+7=66°, 16.180-135=45, 180-(45+40)=95, BDE=ACE=95°
kak no 16 kaya gimana caranya
gak jdi udh ad makasih ya kak
2014-04-20T14:34:32+07:00
<B = 40
<ADE = 135
<EDB =180-135
         = 45
<EDB = <CAD
<BED = 180- (40+45)
         = 95
<DEC = 180-95
         = 85
<C = 360- (45+135+85)
     =95