Предмет: Математика, автор: Аноним

Помогите пожалуста даю 10 балов

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Автор ответа: illay630p6nx3g
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Ответ:

12*4=48 см- периметр квадрата

8*2=16 - сума двох протилежних сторін прямокутника

48-16=32 - сума двох інших

32:2=16 - довжина невідомої

P(квадрата)=12*4=48

P=2a+2b

b=(P-2a):2=(48-2*8):2=16 см - довжина невідомої сторони

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