user-avatar
phamdoanchienbv
2 năm trước
cho tam giác ABD có AB =15cm; AD=20 cm; BD=25cm. Vẽ AM vuông góc với BD a) C/m tam giác ABD vuông. Tính AM; BM; MD b) kẻ tia Bx// AD. Vẽ AM vuông góc BD cắt Bx tại C. C/m AB2= AD . BC c) kẻ tia CE vuông góc AD cắt BD tại I. C/m BM 2= MI . MD d) c/m Stam giác AMB = Stam giác MCD
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

EXERCISE 1 Put the following statements into reported speech. Viết những lời phát biểu sau đây sang Reported-speech. 1. "Is a return ticket cheaper than two singles?" said my uncle. 2. "Do puppies travel free?" asked a dog owner. 3. "Can I bring my dog into the compartment with me?" she asked. 4. "Does this train stop at York?" asked Bill. 5. "Can you telephone from inter – city trains?" said businessman. EXERCISE 2 Put the following statements into reported speech. Viết những lời phát biểu sau đây sang Reported-speech. 1. "Does the 2.40 train have a restaurant car?" he enquired. 2. "Can you get coffee on the train?" asked my aunt. 3. "Do they bring it round on a trolley?" she said. 4. "Are there smoking compartments?" said the man with the pipe. 5. "Have you reserved a seat?" I asked him. EXERCISE 3 Put the following statements into reported speech. Viết những lời phát biểu sau đây sang Reported-speech. 1. "What country do you come from?" said Bill. 2. "How long have you been here?" said Alice. 3. "Are you working as well as studying?" asked Peter. 4. "Have you got a work permit?" Bill wanted to know. 5. "What are you going to study?" asked Jane. EXERCISE 4 Put the following statements into reported speech. Viết những lời phát biểu sau đây sang Reported-speech. 1. Have you enrolled for more than one class?" said Bob. 2. "Do you want to buy any second hand books?" said Bill. 3. "Have you seen the library?" asked Janet. 4. "Do you play rugby?" said Brown. 5."Will you have time to play regularly?" he went on. EXERCISE 5 Put the following statements into reported speech. Viết những lời phát biểu sau đây sang Reported-speech. 1. "Did you play for your school team?" said Fred. 2. "Are you interested in acting?" asked Paula. 3. "Would you like to join our Drama Group?" she said. 4. "What do you think of the canteen coffee?" asked Henry. 5. "How can I get from the station to the airport?" said Kerry. EXERCISE 6 Put the verbs in brackets into the correct tenses. Điền động từ trong ngoặc đơn ở vào đúng thì. 1. If you (read) in bad light you will ruin your eyes. 2. Somebody (steal) your bicyle if you leave it unlocked. 3. What will happen if her parachute (not open). 4. If the page-boy (wash) my car I'll given him a dollar. 5. If she (need) a computer she can borrow mine. EXERCISE 7 Put the verb in brackets into the correct tenses. Điền động từ trong ngoặc đơn ở vào đúng thì. 1. If you (not go) away I'll send for the police. 2. I'll be very angry if she (make) any more mistakes. 3. If they (be) late I'll punish them. 4. He'll be absolutely furious if he (hear) about this. 5. If you put on the Kettle she (make)the tea. EXERCISE 8 Put the verb in brackets into the correct tenses. Điền động từ trong ngoặc đơn ở vào đúng thì. 1. You can use my hand phone if yours (not work). 2. If you (not know) the meaning of a word you may use a dictionary. 3. If Henry (refuse) to help I'll have to manage without him. 4. If Janet (not help) I'll have to manage without her. 5. If you (go out) would you buy me some cigarettes.

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