В четырехугольник ABCD вписана окружность с центром I. Касательные к (AIC) в точках A и C пересекаются в точке Q. Касательные к (BID) в точках B и D пересекаются в точке P. (!) P, I, Q лежат на одной прямой
В четырехугольник ABCD вписана окружность с центром I. Касательные к (AIC) в точках A и C пересекаются в точке Q. Касательные к (BID) в точках B и D пересекаются в точке P. (!) P, I, Q лежат на одной прямой
Individual messages can be fully encrypted. But the user has to turn on that function. It's not automatic, as it is on Signal and WhatsApp. On Feb. 27, however, he admitted from his Russian-language account that "Telegram channels are increasingly becoming a source of unverified information related to Ukrainian events." Sebi said data, emails and other documents are being retrieved from the seized devices and detailed investigation is in progress. WhatsApp, a rival messaging platform, introduced some measures to counter disinformation when Covid-19 was first sweeping the world. The gold standard of encryption, known as end-to-end encryption, where only the sender and person who receives the message are able to see it, is available on Telegram only when the Secret Chat function is enabled. Voice and video calls are also completely encrypted.
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