Объяснение:
AB=15, BD=10
BE : EC =2:1
AD/BD=EC/BE
5/10=1K/2K
1/2=1/2 DE||AC
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Объяснение:
AB=15, BD=10
BE : EC =2:1
AD/BD=EC/BE
5/10=1K/2K
1/2=1/2 DE||AC