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duongthuytrang39
2 năm trước
Bài 1: Tính các góc B,D của hình thang ABCD, biết rằng A= 60, C= 130 Bài 2: Cho ΔABC cân tại A. Trên các cạnh bên AB, AC lấy các điểm M,N sao cho BM=CN a) Tứ giác BMNC là hình gì? Vì sao? b) Tính các góc của tứ giác BMNC biết rằng A= 40 MN rảnh thì vẽ hình hoặc ko vẽ hình cx đc ak. Giup mk vs ak
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