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kyen2707
2 năm trước
Cho tam giác ABC có tia phân giác của góc A cắt BC ở D. Trên nửa mặt phẳng bờ AB không chứa điểm C vẽ tia Bx sao cho góc Abx = góc BAD. Tia Bx cắt đường thẳng AC tại E. a) Chứng minh BE//AD b) Vẽ A vuông góc với BE, F thuộc BE. Tính số đo góc FAD? c) Chứng minh góc EAF=góc BAF
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