Luas ∆ABC
= ½ × BC × AC
= ½ × 12 × 16
= 6 × 16
= 96 cm²
Luas ∆BCD
= ½ × DC × BC
= ½ × 5 × 12
= 5 × 6
= 30 cm²
Luas ∆ABD
= ½ × AD × BC
= ½ × 11 × 12
= 11 × 6
= 66 cm²
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Luas ∆ABC
= ½ × BC × AC
= ½ × 12 × 16
= 6 × 16
= 96 cm²
Luas ∆BCD
= ½ × DC × BC
= ½ × 5 × 12
= 5 × 6
= 30 cm²
Luas ∆ABD
= ½ × AD × BC
= ½ × 11 × 12
= 11 × 6
= 66 cm²