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AhynaPham
2 năm trước
cho tam giac ABC vuông tại A ( AB<AC).Gọi M là trung điểm của BC.Qua M kẻ MI ⊥ AB(I ∈AB) , MK ⊥ AC(K ∈ AC) a, Chứng minh rằng : Tứ giác AIMK là hình chữ nhật b, Gọi D là điểm đối xứng với M qua K. Chứng minh rằng : Tứ giác ADCM là hình thoi
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