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maidan1532000
2 năm trước
Trên cùng 1 nửa mặt phẳng bờ chứa tia Ox vẽ tia Oy, Oz sao cho góc xOy= 50°, góc xOz=100°. a, Tính góc yOz. b, Chứng minh tia Oy là tia phân giác của góc xOz. c, Gọi Ox' là tia đốicủa tia Ox, tia Om là tia phân giác của góc x'Oz. Tính góc yOm C.ơn vì đã giúp mik ^^)
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