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Mathematics, 22.07.2021 19:40 lelliott86
Cho tam giác ABC cân tại A, M là trung điểm của BC. Trên tia đối của AB lấy điểm E, trên tia đối của AC lấy điểm D sao cho AD=AE. Chứng minh rằng hai điểm D và E đối xứng với nhau qua đường thẳng AM
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Cho tam giác ABC cân tại A, M là trung điểm của BC. Trên tia đối của AB lấy điểm E, trên tia đối của...
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