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taeutopia20

Ответ:

ED-средняя линия АВС поэтому ED -0,5

ABC~CDE потому что угол САВ=СЕD и СВА=СDE

Sabc|Sced=AB|ED

Sced=Sabc*AB=Sabc*0,5AB|AB=0,5*4=2

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