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Verified answer
Trapesium ABCD dan EBGF , sebangunAE = 8 cm
AB + EB = 8
EB = 8 - AB
AB/EB = AD/EF = 2/3
AB/(8 - AB) = 2/3
3 . AB = 2(8 - AB)
3AB = 16 - 2AB
3AB + 2AB = 16
5AB = 16
AB = 16/5
AB = 3,2 cm