Nomor 6 tolong dibantu
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6 cm / AB = (BC - BD) / 12 cm
6 cm / AB = (12 cm - 8 cm) / 12 cm
6 cm / AB = 4 cm / 12 cm
AB = 6 cm X 12 cm / 4 cm
AB = 72 cm / 4 cm
AB = 18 cm
DE /BD = AC/BC
DE / 8 cm = 6 cm / 12 cm
DE = 8 cm X 6 cm / 12 cm
DE = 48 cm / 12 cm
DE = 4 cm