winter_29's Content
There have been 1 items by winter_29 (Search limited from 29-05-2020)
Cm $ab+bc+ca=p^2+r^2+4Rr$in Hình học phẳngStarted by kelangthang, 09-01-2012 |
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There have been 1 items by winter_29 (Search limited from 29-05-2020)
Cm $ab+bc+ca=p^2+r^2+4Rr$in Hình học phẳngStarted by kelangthang, 09-01-2012 |
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