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Длина прямоугольника на 20 мм больше ширины ,найди длины сторон этого прямоугольника если его периметр равен 12 см.
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Предмет:
Математика -
Автор:
javon12lo - 6 лет назад
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Ответы 1
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20мм = 2см12см ÷ 2 = 6см длина и ширина вместе.(6 - 2) ÷ 2 = 2см ширина2 + 2 = 4см длинаПроверка:( 2 + 4 ) × 2 = 12 см периметр
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Автор:
tiffany94 - 6 лет назад
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