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Mathematics, 25.07.2021 19:20 adreyan3479
Cho tam giác ABC vuông tại A . Trên AB lấy điểm D . Trên AC lấy điểm E sao cho AD =AE . Qua A và D kẻ đường thẳng vuông góc với BE cắt BC ở I và K . Gọi M là giao điểm của DK và AC . a) Chứng minh tam giác BAE = tam giác CAD . b) Chứng minh tam giác MCD cân. c)Chứng minh IK=IC
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Cho tam giác ABC vuông tại A . Trên AB lấy điểm D . Trên AC lấy điểm E sao cho AD =AE . Qua A và D k...
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