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Mathematics, 21.10.2021 14:00 chelsea1524

Cho hình bình hành abcd có O là giao điểm 2 đường chéo .Kẻ AHvuông góc BD tại H ,CK vuông góc BD tại K a)Cm :AH=CK
b)Cm:AK=CH
c)Cm O là trung điểm của HK

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Cho hình bình hành abcd có O là giao điểm 2 đường chéo .Kẻ AHvuông góc BD tại H ,CK vuông góc BD tại...

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