Как найти периметр
Как найти периметр прямоугольника, квадрата и треугольника. Вспомним разные способы нахождения периметра.
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![Скрытая история Библии [Большой выпуск]](https://sun9-64.userapi.com/fXUPC4YDmKc1rGPZl6GxCm8wDabZbRAZtOd0Uw/QSuhqxq0xSo.jpg)
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