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Mathematics, 25.07.2021 14:00 kingfptduong

Cho tứ giác abcd có ad=bc. các đường trung trực của ab và cd cắt nhau tại e. chúng minh rằng EAB=EDC

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Cho tứ giác abcd có ad=bc. các đường trung trực của ab và cd cắt nhau tại e. chúng minh rằng EAB=EDC...

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