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Mathematics, 17.06.2021 06:50 anna80544

Tính các góc của hình thang abcd (ab//cd), biết : a) tính các góc của tứ giác
b) chứng minh ab//cd
c) ad cắt bc tại e. tính các góc của tam giác edc

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Tính các góc của hình thang abcd (ab//cd), biết : a) tính các góc của tứ giác
b) chứng minh a...

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