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CD= 9 cm
AB= 14 cm
AO= 14-9= 5 cm
BC=OD
> menggunakan phytagoras
OD^2= AD^2 - AO^2= 17^2 - 5^2= 289-25= 264
OD= √264= 16,24 cm
16,24 dibulatkan= 16 cm