Mathematics
Mathematics, 21.07.2021 20:20, zitterkoph

Cho tam giác ABC có 3 góc nhọn (AB a) chứng minh tứ giác BCEF, AEHF nội tiếp

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Cho tam giác ABC có 3 góc nhọn (AB a) chứng minh tứ giác BCEF, AEHF nội tiếp...

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