pakai cara ya kak bantu jawab plissss
__PENYELESAIAN__
luas jajar genjang = 2 × luas ∆ LMN
→ < L + < M = 180°
120° + <M = 180°
< M = 180° - 120°
< M = 60°
→ luas ∆ LMN = ½ × LM × NM × sin <M
= ½ × 12 × 16 × sin 60°
= ½ × 192 × sin 60°
= 96 × ½ √3
= 48√3 cm²
→ luas jajar genjang KLMN = 2 × 48√3
= 96√3 cm³ ( B )
[answer.2.content]
