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nguyenthanhnhan02121997
2 năm trước
Cho tam giác ABC vuông tại A, AC > AB. Trung trực của AB cắt BC tại I. a) Chứng minh rằng AIB và AIC là các tam giác cân. b) Từ I kẻ đường thẳng d vuông góc với BC, cắt tia BA và AC tại M và N; tia BN cắt CM tại E. Chứng minh rằng EB vuông góc MC. c) Chứng minh rằng các đường thẳng EA và BC song song với nhau. d) (Hệ Song bằng không phải làm): Tìm điều kiện của tam giác ABC để N là trọng tâm của tam giác AIE. Giúp mình với ạ, mình cần câu trả lời đầy đủ
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