Talk:Seven circles theorem
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If You known english, please write https://vi.m.wikipedia.org/wiki/Định_lý_Đào_về_sáu_tâm_đường_tròn — Preceding unsigned comment added by 27.67.185.60 (talk) 02:04, 24 August 2018 (UTC)
https://vi.wikipedia.org/wiki/%C4%90%E1%BB%8Bnh_l%C3%BD_t%C3%A1m_%C4%91%C6%B0%E1%BB%9Dng_tr%C3%B2n --14.248.84.234 (talk) 10:47, 8 October 2019 (UTC)