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doananhtin2001st
2 năm trước
CHO TAM GIÁC ABC BIẾT GÓC A=60 ĐỘ , b= 8cm, c= 5cm. TÍNH ĐƯỜNG CAO ha VÀ BÁN KÍNH R CỦA ĐƯỜNG TRÒN NGOẠI TIẾP TAM GIÁC ABC.
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