• Luas OAC
• Sudut OAB
= 90° - sudut BOC
= 90° - 30°
= 60°
• Maka:
jadi, Luas juring OAB = 231 cm²
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• Luas OAC
• Sudut OAB
= 90° - sudut BOC
= 90° - 30°
= 60°
• Maka:
jadi, Luas juring OAB = 231 cm²