Задача первоклассника в 1 шаг! Невероятное решение!
Нахождение площади 4-ка тремя способами.
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![Алла Пугачёва - То ли ещё будет [Песенка первоклассника] (Official HD Video)](https://sun9-72.userapi.com/FzKAZCnocNMoZfvNseejqzgk9_CI57dz0u-FvQ/rw4w9Pruq5o.jpg)
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