Jawabanmu

2014-04-27T10:07:55+07:00
CD + EF
16+12 = 28

AB/DE = CD/CD+EF
X/18 = 16/28 = 28/16 x 18 = 18/16 = 1,125 x 28 = 31,5 jawabannya C
2014-04-27T10:40:01+07:00
CD + EF = ?
16  + 12  = 28


 \frac{X}{18} =  \frac{16}{28} =  \frac{28}{16} X 18

 \frac{18}{16} = 1,125 X 28 = 31,5

Jadi panjang AB = 31,5
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