Mathematics
Mathematics, 22.07.2021 14:00, Merida06

cho hình thang ABCD, AB//CD, có các tia phân giác của các góc A và góc D cắt nhau tại I thuộc cạnh bên BC, chứng minh rằng AD bằng tổng của 2 đáy

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cho hình thang ABCD, AB//CD, có các tia phân giác của các góc A và góc D cắt nhau tại I thuộc cạnh b...

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