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tranhoanglan2201
2 năm trước
Bài 1: Cho hình bình hành ABCD, AB = 2AD. Kẻ BE ⊥ AD ( E ∈ AD). Nối E với trung điểm F của CD. Kẻ FH ⊥ BE ( H ∈ BE); FH cắt AB tại K. a) CMR: ΔBEF cân b) CMR: ADC=2DEF P/s: Khó quá các anh chị giúp em với😢😢😢
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