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chiphuong0407
2 năm trước
Trên cùng một nửa mặt phẳng bờ có chứa toa Ox , vẽ 2 tia Oy và Oz sao cho xOy= 30 độ. xOz= 90 độ a, Trong 3 tia, tia nào nằm giữa 2 tia còn lại vì dao? b, Tính yOz c, Vẽ tia Ot là tia phấn giác của yOz, tia Ot' là tia đối của tia Ot. Tính yOt' Giúp mk nha( vẽ hình nx)
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