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a,Thế nào là góc vuông?,góc nhọn?,góc tù? cho ví dụ? b,Hãy cho biết mỗi câu dưới đây đúng hay sai? a,Góc có số đo 135o là góc nhọn b,Góc có số đo 75o là góc tù c,Góc có số đo 90o là góc bẹt d,Góc có số đo 180o là góc vuông e,Góc có số đo 1v là góc nhọn g,Một góc nhỏ hơn góc bẹt thì phải là góc tù
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