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Простая, но тем не менее довольно красивая задача.
Даны треугольник ABC и произвольная точка P. Пусть Ha, Hb, Hc – ортоцентры треугольников BPC, APC, APB соответственно. (!) Площади треугольников ABC и HaHbHc равны.
Простая, но тем не менее довольно красивая задача.
Даны треугольник ABC и произвольная точка P. Пусть Ha, Hb, Hc – ортоцентры треугольников BPC, APC, APB соответственно. (!) Площади треугольников ABC и HaHbHc равны.
You may recall that, back when Facebook started changing WhatsApp’s terms of service, a number of news outlets reported on, and even recommended, switching to Telegram. Pavel Durov even said that users should delete WhatsApp “unless you are cool with all of your photos and messages becoming public one day.” But Telegram can’t be described as a more-secure version of WhatsApp. The next bit isn’t clear, but Durov reportedly claimed that his resignation, dated March 21st, was an April Fools’ prank. TechCrunch implies that it was a matter of principle, but it’s hard to be clear on the wheres, whos and whys. Similarly, on April 17th, the Moscow Times quoted Durov as saying that he quit the company after being pressured to reveal account details about Ukrainians protesting the then-president Viktor Yanukovych. In 2018, Russia banned Telegram although it reversed the prohibition two years later. 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. In view of this, the regulator has cautioned investors not to rely on such investment tips / advice received through social media platforms. It has also said investors should exercise utmost caution while taking investment decisions while dealing in the securities market.
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