Cho tam giác ABC là tam giác nhọn ; có đường cao Ah . Trên nửa mặt phẳng bờ AB chứa điểm C vẽ AF vuông góc với AB và AF = AB
a) Chứng Minh Eb =Fc
b) Chứng Minh N là trung điểm của EF
giải giúp mình mình tick cho nha bạn giải giúp mình nha
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30 tháng 4 2023
a: Xet ΔAEB và ΔAFC có
góc AEB=góc AFC
góc A chung
=>ΔAEB đồng dạng với ΔAFC
=>AE/AF=AB/AC
=>AE/AB=AF/AC
b: Xét ΔAEF và ΔABC co
AE/AB=AF/AC
góc A chung
=>ΔAEF đồng dạng với ΔABC