diameter = 40 cm, sehingga jari-jari = OA = OB = 20 cm
tali busur AB = 24 cm, sehingga AD = DB = 12 cm
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diameter = 40 cm, sehingga jari-jari = OA = OB = 20 cm
tali busur AB = 24 cm, sehingga AD = DB = 12 cm