Ответ:
BO:OC=DO:AO=BD:AC=k
P1=12+10+14=36
P2=15+18+21=54
K=36/54
K=2/3
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Ответ:
BO:OC=DO:AO=BD:AC=k
P1=12+10+14=36
P2=15+18+21=54
K=36/54
K=2/3