Jawabanmu

2014-08-30T17:25:58+07:00
2014-08-30T17:31:20+07:00
EF=(AE x DC) + (AB x DE) : AE + ED
= ( 7 X 8) + ( 18 X 3 ) : 7 + 3
= (56 + 54) : 10
= 110 : 10
= 11 CM