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Cau 7. Cho tam giac deu ABC co canh bang a. Tinh tich vo huong A B.B C. C A. A (BC)=a^2 B. (BC)=(a^2√3)/2 C. A (BC)=-(a^2)/2 D. A (BC)=(a^2)/2 相关知识点: 试题来源: 解析 CChọn CXác định được góclà góc ngoài của gócnên...
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