Найдите площадь квадрата, если длина стороны квадрата равна ширине прямоугольника ,у которого периметр 40см, длина-13см
ApokalipsisZnanij
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29.04.2019 18:55
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ширина прямоугольника = 40-(13×2):2=7
S квадрата = 7×7=49
ответ:144
Пошаговое объяснение: