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Luas Δ ADC = ½ × 16 × 12
__________ = 8 × 12
__________ = 96cm²
Luas Δ BDC = ½ × 5 × 12
__________ = 5 × 6
__________ = 30cm²
JADI LUAS Δ ABC = 96 - 30 = 66cm²
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