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Ответ

Автор - sudnik69

Ответ:

60 см2

Пошаговое объяснение:

#1 CD=AC/2=12/2=6 см

S=AD*CD=10*6=60 (см2)

#2 P=2(AB+BC)=2(4BC+BC)=10BC

BC=30/10=3 см

AB=4BC=12 см

S=AB*BC=3*12=36 (см2)

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