Jawabanmu

2014-07-01T21:16:58+07:00
AB = 9cm
CD = 4cm
EF =.....?
jawab
EF =  \frac{1}{2} (AB+CD)
EF =  \frac{1}{2}(9cm+4cm)
EF = \frac{1}{2}.13cm
EF =6,5


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