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№25 (Отбор на осеннюю тренировочную программу по математике @Geometry Weekly
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№25 (Отбор на осеннюю тренировочную программу по математике, г. Москва, 2023)

I - инцентр ABC. P - произвольная точка на меньшей дуге AB. W_AW_B || CX. I_1 и I_2 - инцентры APC и PBC.
Доказать, что PI_1I_2Q вписанный

Geometry Weekly
№25 (Отбор на осеннюю тренировочную программу по математике, г. Москва, 2023)

I - инцентр ABC. P - произвольная точка на меньшей дуге AB. W_AW_B || CX. I_1 и I_2 - инцентры APC и PBC.
Доказать, что PI_1I_2Q вписанный
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Telegram announces Anonymous Admins

The cloud-based messaging platform is also adding Anonymous Group Admins feature. As per Telegram, this feature is being introduced for safer protests. As per the Telegram blog post, users can “Toggle Remain Anonymous in Admin rights to enable Batman mode. The anonymized admin will be hidden in the list of group members, and their messages in the chat will be signed with the group name, similar to channel posts.”

№25 (Отбор на осеннюю тренировочную программу по математике

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