bài 1 vẽ hình theo cách diễn đạt sau đây : a) vẽ góc bẹt xOt b) vẽ góc AOB và BOC sao cho tia OC nằm giữa 2 tia OA,OB c) vẽ các gocsxOy,yOz,zOt sao cho tia Oz nằm trong góc xOy,tia Oy nằm trong góc zOt và xOt là góc bẹt bài 2 a góc tạo bởi 2 tia om và... gọi là góc mon,kí hiệu.... b góc mnp có đỉnh là ... và hâ=ai cạnh là...,kí hiệu...... c góc tạo bởi hai tia oy,ox là góc....,kí hiệu... d góc có đỉnh là........ và hai cạnh là...... ký hiệu là ABC e hai đường thẳng AB và CD cắt nhau tại điểm O các góc các góc bẹt là......

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