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Нехай 𝐵𝐸 і 𝐶𝐹 − медіани △ 𝐴𝐵𝐶, 𝐺 − точка їх перетину. На відрізках 𝐺𝐹 та 𝐺𝐸 знайшлися точки 𝐾 і 𝐿 відповідно такі, що 𝐵𝐾=𝐶𝐿=𝐴𝐺. Доведіть, що ∠𝐵𝐾𝐹 +∠𝐶𝐿𝐸 =∠𝐵𝐺𝐶.
Нехай 𝐵𝐸 і 𝐶𝐹 − медіани △ 𝐴𝐵𝐶, 𝐺 − точка їх перетину. На відрізках 𝐺𝐹 та 𝐺𝐸 знайшлися точки 𝐾 і 𝐿 відповідно такі, що 𝐵𝐾=𝐶𝐿=𝐴𝐺. Доведіть, що ∠𝐵𝐾𝐹 +∠𝐶𝐿𝐸 =∠𝐵𝐺𝐶.
He adds: "Telegram has become my primary news source." "There is a significant risk of insider threat or hacking of Telegram systems that could expose all of these chats to the Russian government," said Eva Galperin with the Electronic Frontier Foundation, which has called for Telegram to improve its privacy practices. WhatsApp, a rival messaging platform, introduced some measures to counter disinformation when Covid-19 was first sweeping the world. "Your messages about the movement of the enemy through the official chatbot … bring new trophies every day," the government agency tweeted. "Markets were cheering this economic recovery and return to strong economic growth, but the cheers will turn to tears if the inflation outbreak pushes businesses and consumers to the brink of recession," he added.
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