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nghiabanfreefire
2 năm trước
Cho hình chữ nhật ABCD, O là giao điểm 2 đường chéo AC và BD.K là điểm đối xứng với A qua I. Qua I thuộc OA, kẻ đường thẳng song song BD cắt AD tại E và AB tại F. H là trung điểm BE, M là trung điểm DF. a) Chứng minh AFKE là hình chữ nhật. b) Chứng minh IO=HM. Giup mk với, mk cảm mơn nha!
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