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ThanhSon17
2 năm trước
Mn giúp em zới ạ E đánh giá 5* : 3. Cho hai góc kề nhau xOy và yOz có tổng bằng 150° và xOy- yOz - 90 độ. a) Tính số đo xOy và yOz. b) Gọi Oz' là tia đối của tia Oz. Hãy so sánh xOz và yOz.
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