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Объяснение:
SPAMSPAM SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey SwiftKey
Периметр - сумма длин всех сторон фигуры, то есть периметр даного прямоугольника будет равен х+х+х+8+х+8=4х+16(см).
Площадь прямоугольника равна длине меньшей стороны, умноженной на длину большей, то есть х*(х+8)=х^2+8х.