Cho tam giác ABC vuông tại A, M là trung điểm của BC. Trên tia đối tia MA, lấy điểm D sao cho MA=MD. Gọi N là trung điểm của AC. Chứng minh rằng:
a, Tam giác ABM = tam giác DCM và AB=DC
b, DC vuông góc với AC
c, NM là tia phân giác của BND
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NT
4 tháng 1 2021
(1): The weather (6): They are going to have a good lunch together
(2): staying (7): with
(3): Mr.Kien (8): they
(4): are (9): evening
(5): washing (10): finish
4 tháng 1 2021
Fill in each blank with the suitable word.
Today is Sunday . The weather (1) is fine and warm. Mr Kien's family are staying(2) at home. They are working in the home now. Mr Kien is cleaning the doors and windows. Nam is helping Mr.Kien(3). Mrs Oanh and Hoa are (4) in the kitchen. Mrs Oanh is washing(5) the dishes. Hoa is cleaning the vegetables. They are cooking the lunch. They are going to have (6) a good lunch together.
Mr Kien's family are not free today.They are busy with(7) the housework, but they are very happy. They are going to finish the housework at half past eleven, then they (8) will have lunch. In the afternoon they are going to the park. In the evening (9) Nam and Hoa are going to finish(10) all the exercises before going to bed.