Ответ:
CD=AB=5
OD=BD:2=13:2=7.5
OD=OC=7.5
P(COD)=OC+OD+CD=5+7.5+7.5=20
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Ответ:
CD=AB=5
OD=BD:2=13:2=7.5
OD=OC=7.5
P(COD)=OC+OD+CD=5+7.5+7.5=20