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2 năm trước
Cho tam giác ABC vuông ở A có cạnh AC 25cm, cạnh AB 20cm. Từ góc vuông A người ta kẻ 1 đoạn thẳng vuông góc với cạnh BC là 12,5 cm. Tìm chu vi tam giác vuông ABC bằng bao nhiêu xăng ti mét? Giúp mk câu 6 nha. Nhanh, đúng mk cho CTL hay nhất
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