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Задача. Дан квадрат 𝐴𝐵𝐶𝐷. Точки 𝑃 и 𝑄 лежат на 𝐴𝐵 и 𝐵𝐶 соответственно так, что 𝐵𝑃 = 𝐵𝑄. Пусть 𝐻 — основание перпендикуляра из точки 𝐵 на отрезок 𝑃𝐶. Докажите, что ∠𝐷𝐻𝑄 = 90°.
Задачка имеет чисто геометрическое решение без всяких отношений отрезков и, уж тем более, без декартов!
Желаем вам нестандартных и соломоновых решений сегодня 👨🎓
Задача. Дан квадрат 𝐴𝐵𝐶𝐷. Точки 𝑃 и 𝑄 лежат на 𝐴𝐵 и 𝐵𝐶 соответственно так, что 𝐵𝑃 = 𝐵𝑄. Пусть 𝐻 — основание перпендикуляра из точки 𝐵 на отрезок 𝑃𝐶. Докажите, что ∠𝐷𝐻𝑄 = 90°.
Задачка имеет чисто геометрическое решение без всяких отношений отрезков и, уж тем более, без декартов!
Желаем вам нестандартных и соломоновых решений сегодня 👨🎓
To that end, when files are actively downloading, a new icon now appears in the Search bar that users can tap to view and manage downloads, pause and resume all downloads or just individual items, and select one to increase its priority or view it in a chat. Emerson Brooking, a disinformation expert at the Atlantic Council's Digital Forensic Research Lab, said: "Back in the Wild West period of content moderation, like 2014 or 2015, maybe they could have gotten away with it, but it stands in marked contrast with how other companies run themselves today." As such, the SC would like to remind investors to always exercise caution when evaluating investment opportunities, especially those promising unrealistically high returns with little or no risk. Investors should also never deposit money into someone’s personal bank account if instructed. Oleksandra Matviichuk, a Kyiv-based lawyer and head of the Center for Civil Liberties, called Durov’s position "very weak," and urged concrete improvements. Right now the digital security needs of Russians and Ukrainians are very different, and they lead to very different caveats about how to mitigate the risks associated with using Telegram. For Ukrainians in Ukraine, whose physical safety is at risk because they are in a war zone, digital security is probably not their highest priority. They may value access to news and communication with their loved ones over making sure that all of their communications are encrypted in such a manner that they are indecipherable to Telegram, its employees, or governments with court orders.
from es
