Mathematics, 17.09.2021 14:10 brittanysanders
Cho hình thang ABCD (AB // CD), AB = 3cm; BC = 7cm. Gọi E, F lần lượt là trung điểm AC, BD. Chứng minh EF // CD và tính EF.
Answers: 3
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Cho hình thang ABCD (AB // CD), AB = 3cm; BC = 7cm. Gọi E, F lần
lượt là trung điểm AC, BD. Chứng...
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