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rangmuoi1001
2 năm trước
Tam giác ABC Vuông tại A. Các tia phân giác góc B và góc C cắt nhau tại I. Kẻ IH vuông góc với BC( H thuộc BC). B+ HI= 1cm, HB= 2cm, HC= 3cm. Tính chu vi tam giác ABC
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