user-avatar
binhh2554
2 năm trước
Cho tam giác ABC. Gọi D là trung điểm của AB. Trên cạnh BC lấy điểm E sao cho CE = 1/3 BE. a. So sánh diện tích tam giác ABE với diện tích tam giác ABC. b. Tính diện tích tam giác ABC biết diện tích tam giác BDE là 12 cm^2. c. Tính diện tích tứ giác ACED Giúp vs ạ!Cần gấp!Làm bài 6 thôi!Môn toán!
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Part 4. Reading I. Fill in the blank with a word/ phrase in the box. children TV /channels /music channels / educational adults / seen / reduce / important / concentration Television has a very (1) ………… role in a person's life. Poor or rich, it is (2)……………… in every houses now a days. Television was the amazing discovery of science. We can see the whole world in it's small screen. There are various (3)………………like movie channels, news channels, cartoon channels, (4) ………………, sports channels etc. Our favourite TV programs help to (5) ……………… our mind's tiredness when we become tired after work/study. (6) ……………… like to watch cartoon channels. There are various (7) ……………… channel like Discovery, National Geography that can increase the knowledge boundaries of a student. A TV can entertain not only children and students but also the (8) ……………… and the old people. We also see our parents watching their favourite TV serials at night. However, we shouldn't watch (9)………………for long time. Watching TV constantly for hours can affect our eyes and brain. You can also loose your (10) ……………… on your study. II. Read the following passage and answer the questions. Football is a popular game which keeps players healthy and disciplined. It develops their mind and team spirit and sense of tolerance among them. It is a game played for ninety minutes (in two halves of 45 minutes and 15 minutes breaks). This game has two teams of eleven players in each. Players have to kick a ball with their foot and take a goal by putting ball into the goalpost of the opponent team. In order to oppose the goal made by players of opponent team, there is a goalkeeper on each side. No one player is allowed to touch the ball with hand except the goal-keeper. A team having more goals got declared as the winner and other as loser. The game is conducted by a referee and two linesmen (one on each side). All the players are warned to strictly follow the rules while playing this game. It has been an international game and played as World Cup tournament every four years in different countries worldwide. 1. What is a popular game? ......................................................................... 2. How long does the football match last? ............................................................................... 3. Does a team have 12 players? ............................................................................ 4. Who is allowed to touch the ball with hand? ................................................................................. 5. Who conducts the game? .................................................................................. Part 5.Writing I. Use the conjunctions (but, and, so, or, because, although) to connect the sentences. 1. I don't like watching TV much. It hurts my eyes. ....................................................................................... 2. The newsreader on CNN reads very fast. My sister can hear everything in the news. .................................................................................... 3. She loves football. She doesn't like playing football. .................................................................................. 4. VTV3 is my favourite channel. VTV1 is my favourite channel. ......................................................................................... 5. They're listening to music. They can't hear me. ....................................................................................... 6. You can read Angels and Demons in the library. You can borrow and read it at home. .......................................................................................... 7. I like travelling. I like climbing. ................................................................................................ 8. My mother lost the key. She couldn't enter her house. ........................................................................................ 9. The game show is on VTV3. The science programme is on VTV2. .................................................................................. 10. I can't watch the football match. It is on at 2am. ........................................................................................ minh het diem mong cac ban thong cam

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team