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Levuanhthu
2 năm trước
Bài 1 a,Hai đường thẳng AB và CD cắt nhau tại O. Biết 𝐴̂𝑂𝐶 – 𝐴̂𝑂𝐷 = 20 độ. Tính các góc AOC, COB, BOD, DOA. . b ,Hai đường thẳng AB và CD cắt nhau tại O tạo thành 𝐴̂𝑂𝐶 = 70 độ. Gọi OM là tia phân giác của 𝐵̂𝑂𝐷. Tính 𝐶̂𝑂𝑀 vẽ hình cả 2 câu hộ mình luôn nha
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