AB=20дм
СД=50 дм
ВС=60 дм
МД=30 дм
S=?

S=AB×(BC×MD)+CD×(BC-MD)×S=
S=BC×AB+MK×(CD-AB)×S=
Жауабы қандай?
Помагите тоже математика...срочнаа​
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