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baonguyen
2 năm trước
câu 1:chọn phát triển đúng trong các phát triển sau: A. hai góc tù là hai góc kề nhau B. cho ba tia chung góc Ox, Oy, Oz ta luôn có :xOy+yOz=xOz C. nếu tia Oy nằm giữa hai tia On và Om thì khi đó có:yOn+yOm=mOn D. nếu A và B là hai góc bù nhau thì tOu+tOv=uOv
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