1. EF - ср.лин.тр., зн EF=5
EBF=4+5+5=14
2.AC= 2MN= 6
ABC =8+7+6=21
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1. EF - ср.лин.тр., зн EF=5
EBF=4+5+5=14
2.AC= 2MN= 6
ABC =8+7+6=21