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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 👨🎓
"The inflation fire was already hot and now with war-driven inflation added to the mix, it will grow even hotter, setting off a scramble by the world’s central banks to pull back their stimulus earlier than expected," Chris Rupkey, chief economist at FWDBONDS, wrote in an email. "A spike in inflation rates has preceded economic recessions historically and this time prices have soared to levels that once again pose a threat to growth." The SC urges the public to refer to the SC’s I nvestor Alert List before investing. The list contains details of unauthorised websites, investment products, companies and individuals. Members of the public who suspect that they have been approached by unauthorised firms or individuals offering schemes that promise unrealistic returns For example, WhatsApp restricted the number of times a user could forward something, and developed automated systems that detect and flag objectionable content. Stocks closed in the red Friday as investors weighed upbeat remarks from Russian President Vladimir Putin about diplomatic discussions with Ukraine against a weaker-than-expected print on U.S. consumer sentiment. What distinguishes the app from competitors is its use of what's known as channels: Public or private feeds of photos and videos that can be set up by one person or an organization. The channels have become popular with on-the-ground journalists, aid workers and Ukrainian President Volodymyr Zelenskyy, who broadcasts on a Telegram channel. The channels can be followed by an unlimited number of people. Unlike Facebook, Twitter and other popular social networks, there is no advertising on Telegram and the flow of information is not driven by an algorithm.
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