Jawabanmu

Jawaban paling cerdas!
2014-05-04T17:08:42+07:00
Perbandingan AB:CD = 12:9 = 4:3
AB:CD = OB:OD = 4:3
OB+OD = 7x = 14cm. x = 2cm
OB = 4x = 4 × 2 = 8 cm
2014-05-04T17:13:20+07:00
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