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60° + 90° + ∠YOZ = 180°
∠YOZ = 180°-60°-90°
∠YOZ = 30°
∠AOZ = ∠BOX (bertolak belakang)
∠AOZ = 60°
∠AOZ/luas AOZ = ∠YOZ/luas YOZ
60° / 32 cm² = 30° / luas YOZ
luas YOZ = 30° x 32cm² / 60°
luas YOZ = 16 cm²
semoga bermanfaat,
tandai sebagai jawaban terbaik ya! :)