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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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Aboard 60 in. long is cut two parts so that the longer piece is 5 times the shorter. what are the length of the two pieces?
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Cho tam giác ABC có 3 góc nhọn (AB
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