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NiBazno123
@NiBazno123
July 2022
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РЕШИТЕ ПОЖАЛУЙСТА ЗАДАЧУ С ДАНО И РЕШЕНИЕМ !!!
На рисунке MN//AC:
а)докажите что AB*BN=CB*BM
б)найдите MN(AM=6;BM=8;AC=21)
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sedinalana
Verified answer
MN||AC⇒<BMN=<BAC,<BNM=<BCA соответственные⇒
1)AB/BC=MB/BN⇒AB*BN=BC*MB
2)AB/MB=AC/MN,AB=AM+BM
(6+8)/8=21/MN
MN=8*21/14=12
1 votes
Thanks 3
bzsr1
Перед 1) вставить :"треуольники АВС и MBN подобны"
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Answers & Comments
Verified answer
MN||AC⇒<BMN=<BAC,<BNM=<BCA соответственные⇒1)AB/BC=MB/BN⇒AB*BN=BC*MB
2)AB/MB=AC/MN,AB=AM+BM
(6+8)/8=21/MN
MN=8*21/14=12