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Mathematics, 24.06.2021 14:30 olive4945

Cho hình thoi ABCD có góc A = 60 độ. Qua C kẻ đường thẳng d cắt tia đối của các tia BA, DA theo thứ tự ở E ,F Chứng minh rằng:

a EB/BA = AD/DF

b tam giác EBD đồng dạng với tam giác BDF
c) BID=102 độ

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Cho hình thoi ABCD có góc A = 60 độ. Qua C kẻ đường thẳng d cắt tia đối của các tia BA, DA theo thứ...

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