cho tam giác ABC vuông tại A, phân giác BF. Từ điểm I nằm giữa B và F vẽ đường thẳng song song với AC cắt AB, BC lần lượt tại M và N. Vẽ đường tròn ngoại tiếp tam giác BIN cắt AI tại D. Hai đường thẳng DN và BF cắt nhau tại E. Chứng minh: a) 4 điểm A, B, D, E cùng thuộc 1 đường tròn b) 5 điểm A, B, C, D, E cùng thuộc 1 đường tròn. Từ đó => BE vuông góc với CE

Một thửa ruộng hình bình hành có độ dài đáy là 100m chiều cao là 50m. Người ta trồng lúa ở đó, tính ra cứ 100m2 thu hoạch được 50kg thóc. Hỏi thu hoạch được ở thửa ruộng đó bao nhiêu tạ thóc

Các bạn giúp mk nhé cảm ơn các bạn trước

nnduc và các chuyên gian giúp em câu 3 ạ

Mn giúp e câu 5 đi ạ e đg cần gấp thanks mn ạ ^^

nnduc và các chuyên gian giúp em câu 1 ạ

Cho tam giác ABC vuông cân ở A ,M là trung điểm BC , điểm E nằm giữa M và C. Kẻ BH, CK vuông góc với AE . chứng minh rằng: a) BH = AK b) tam giác MBH = tam giác MAK c) tam giác MHK là tam giác vuông cân

Ex1. Read the following passage and answer the questions There are two main kinds of sports : team sports and individual sports. Team sports are such sports as baseball, basketball and volleyball. Team sports require two separate teams. The teams play against each other. They compete against each other in order to get the best score. For example, in a football game, if team A scores 4 goals and team B scores 3 goals, team A wins the game. Team sports are sometime called competitive sports 1. How many main kinds of sports are there in the world? _____________________________________________________________________ 2. Can you name some team sports? ______________________________________________________________________ 3. How many teams do team sports require? _______________________________________________________________________ 4. Why do two separate teams compete against each other? ________________________________________________________________________ 5. What are team sports sometimes called? _________________________________________________________________________ Ex2: Choose the correct word A,B,C or D for each gap to complete the following passage In the match (1)............... Nguyen Du Team, and Trung Vuong Club which took place last Sunday, Nguyen Du Team beat Trung Vuong Club by three goals to two The last time the two teams met, Trung Vuong club won by three goals (2)........................ nil, so Nguyen Du team were making a great discussion to win this match. In the first half to the (3)......................., Trung Vuong club was leading by two (4)................. However, Trung Vuong Club (5).................... a number of careless mistakes during the second half. This was after their player, Minh, missed the ball, slipped and (6)................ heavily Nguyen Du team then (7) ............... two lucky goals, and in the few minutes before the finish, Vinh shot the ball into the net, bringing the score to three goals to two. Nguyen Du Team (8)......................... played well this season and their fans have good reason to be proud. Trung Vuong Club too, has had good results up to now. This is the first game they lost 1.A. on B. between C. of 2.A. to B. by C. for 3.A. play B. match C. performance 4.A. matches B. players C. goals 5.A. is making B. makes C. made 6.A. falls B. fell C. is falling 7.A. had B. scored C. put 8.A. plays B. has played C. played Ex3: Read the text and mark the sentences as True (T) or False (F). A study into children's television viewing habits reveals that children whose parents have high level of education tend to watch less television than children from less educated family backgrounds. The report also suggests that high rate of TV watching amongst children in poorer suburban areas and in the provlnces, compared to those living in large urban centres, is often due to poverty and lack of other kinds of entertainment in the area. Discos, cinema, theatre and sports activities offer children in urban centres a wider range of pastimes, whhich leads to fewer hours being spent in front of TV. Commercial, comedies and adventure films are children's favourite proggrammes, while twenty percent of children said they preferred violent films and thrillers 1. Children whose parents have high level of education watch much TV 2. Children in poorer suburban areas and in the provinces watch less TV 3. There are a lot of entertainments in the suburban areas and in the provinces 4. Children in urban centres have many sports activities to do at pastimes 5. Almost of children like comercial, comedies, and adventure films on TV

mọi người giúp mk với mk đang cần gấp các câu trắc nghiệm. mk hứa sẽ vote 5 sao

Làm ơn giúp mình với vàn gấp lắm