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Birain
2 năm trước
Cho tam giác ABC cân tại A Vẽ BH vuông góc với AC tại H ck vuông góc với AB tại k Chứng minh BH = CK Gọi A là giao điểm của BH và ck Chứng minh tam giác EBC cân Chứng minh AE là tia phân giác của góc B AC Vẽ hình và ghi lời giải cụ thể dùm mình chân thành cảm ơn
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