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Mathematics, 05.08.2021 14:00 gabrielmtrue

Cho tứ giác ABCD có góc A=120 độ,góc B=2C=2D chứng minh ABCD là hình thang cân

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Cho tứ giác ABCD có góc A=120 độ,góc B=2C=2D chứng minh ABCD là hình thang cân...
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