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MBAPPE
2 năm trước
Cho tam giác ABC vuông tại A, lấy E thuộc BC sao cho BE=BA, kẻ BI vuông góc với BC (I thuộc AC) a) Chứng kinh BI là tia phân giác của góc ABC B) Trên tia đối của tia AB lấy K sao cho AK=EC, Chứng minh KI=CI c) Chứng minh E,I,K thẳng hàng d) Gọi H là giao điểm của BI và CK, chứng minh HB là tia phân giác của Góc AHE (giúp mình nhanh nha, mình đang cần gấp)
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