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AB= 12 (p)
AD= 8 (l)
bangun ABCD sebangun dengan AEFD
perbandingan panjang dan lebar bangun ABCD = 12:8 atau 3:2
perbandingan panjang dan lebar bangun AEFD = 3:2, jadi kalau panjang nya =8 berarti lebarnya = (8/3)x2 = 5,33 cm