Vẽ góc xAy=35 độ a)vẽ góc x'Ay' đối đỉnh với xAy b) viết tên các góc có số đo =35 độ viết tên các góc có số đo bằng 145 độ bài 2: cho 2 đường thẳng mn,pq cắt nhau tại I tạo thành góc mIp=45 độ a) tính số đo của góc nIq b)tính số đo của góc mIq c) viết tên các cặp góc đối đỉnh d)viết tên các cặp góc bù nhau

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