Задача. Про выпуклый пятиугольник 𝑅𝐴𝐷𝑂𝑆 известно, что 𝑅𝑆 = 𝑆𝑂 и ∠𝐴𝑅𝑆 = ∠𝐷𝑂𝑆 = 90°. Внутри 𝑅𝐴𝐷𝑂𝑆 взята точка 𝑇 так, что 𝑅𝑇 ⊥ 𝐴𝑆 и 𝑇𝑂 ⊥ 𝐷𝑆. Докажите, что 𝑆𝑇 ⊥ 𝐴𝐷.
Задача. Про выпуклый пятиугольник 𝑅𝐴𝐷𝑂𝑆 известно, что 𝑅𝑆 = 𝑆𝑂 и ∠𝐴𝑅𝑆 = ∠𝐷𝑂𝑆 = 90°. Внутри 𝑅𝐴𝐷𝑂𝑆 взята точка 𝑇 так, что 𝑅𝑇 ⊥ 𝐴𝑆 и 𝑇𝑂 ⊥ 𝐷𝑆. Докажите, что 𝑆𝑇 ⊥ 𝐴𝐷.
And indeed, volatility has been a hallmark of the market environment so far in 2022, with the S&P 500 still down more than 10% for the year-to-date after first sliding into a correction last month. The CBOE Volatility Index, or VIX, has held at a lofty level of more than 30. Additionally, investors are often instructed to deposit monies into personal bank accounts of individuals who claim to represent a legitimate entity, and/or into an unrelated corporate account. To lend credence and to lure unsuspecting victims, perpetrators usually claim that their entity and/or the investment schemes are approved by financial authorities. Since its launch in 2013, Telegram has grown from a simple messaging app to a broadcast network. Its user base isn’t as vast as WhatsApp’s, and its broadcast platform is a fraction the size of Twitter, but it’s nonetheless showing its use. While Telegram has been embroiled in controversy for much of its life, it has become a vital source of communication during the invasion of Ukraine. But, if all of this is new to you, let us explain, dear friends, what on Earth a Telegram is meant to be, and why you should, or should not, need to care. Also in the latest update is the ability for users to create a unique @username from the Settings page, providing others with an easy way to contact them via Search or their t.me/username link without sharing their phone number. In addition, Telegram now supports the use of third-party streaming tools like OBS Studio and XSplit to broadcast live video, allowing users to add overlays and multi-screen layouts for a more professional look.
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