Cho đường tròn (O,R). Đường kính AB. Gọi i là trung điểm OA. Qua i vẽ dây MN vuông góc với AB 

a) Tứ giác AMON là hình j 

b) Qua M kẻ tiếp tuyến với đường tròn (O) cắt tia OA tại H. Tính độ dài OH  biết AM = R 

complete the second sentence so that it has a similar meaning to the first sentence

4. '' You must stay in bed until next Monday!'' the doctor said

complete the second sentence so that it has a similar meaning to the first sentence

3. Joana couldn't decide when she should start her journey 

complete the second sentence so that it has a similar meaning to the first sentence

2.''When should i register for the new course on Chinese?'' Jim asked his teacher

complete the second sentence so that it has a similar meaning to the first sentence

1. ''Where did you meet him?'' Jimmy asked