cho tam giác abc có ab < ac. gọi ax là tia phân giác góc a . qua trung điêm m của bc kẻ đường thẳng vuông góc với ax, cắt đường thẳng vs ax, cắt đg thẳng ab-ac lần lượt tại d và e. a. chứng minh ade cân b. qua b kẻ đg thẳng // ac, cắt de tại f. cm bd=bf cm. bd=ce

hiện nay số dân của một làng là 8000 người. hàng năm cứ 1000 người thì tăng đc 25 người. số người tăng của làng đó sau 1 năm là bao nhiêu'

V.Choose the word (a, b, c, or d) that best fits each of the blank spaces. This composition is about my aunt's (1).. . in Florida last year. She hired a car at Miami (2)..... , and soon (3).....lost. So, she stopped to ask a young man how to get to the hotel. Unfortunately, the young man had a gun; he made my aunt get (4).. and she had to give him all her money. Luckily, a police car drove past a few minutes later and (5).... and got my aunt's money back. (6).... the end, my aunt had quite a good holiday, but she said that she was happy to get back home. 1. A holiday B. vacation C. festival D. A and B 2. A. airport B.airway C. airplane D. airstrip 3. A. took B.had C.got D. caught 4. A. in B. out C. inside D.outsde 5. A.pickek her up B.picked up her C. showed her around D.showed around her 6. A. in b. at C. on D. when VI choose the best option A,B,C or D to complete the sentence 1.Minh used to............. his homework late in the evening A. does B.do C.doing D.did 2. If people............................. the rules,there are no more accident A. follow B.take care of C.obey D.remember 3. You should ..........................right and left when you go across the roads A. see B.look C.be D.take 4. Hurry up or we can't ...........................the last bus home A.keep B.follow C.go D.catch 5.Lan used to go to school.................. A. with B.by foot C.in car D. by bus 6. Public ................................in my town is good and cheap A. transport B. tour c. journey D.travel 7.................................is not very far from here to the city centre A. that B.this C.It D.there 8.When there is a traffic jam, it................... me very long time to go home A. costs B.takes C.lasts D.spends 9.Mai's dad usually drives her to school ...........................her to school is very far from her house A. but B. though C.because D.or 10. Yesterday Hoa and Loan ..................round West Lake. It took them an hour A.cycle B.cycles C.cycling D.cycled Giúp mình nha yêu các bạn nhiều cảm ơn ạ

Cho tam giác ABC, có AB = 6cm, AC = 9cm, BC = 10cm, đường phân giác trong AD, phân giác ngoài AE. Đường phân giác CF cắt AD tại I Tính tỉ số diện tích Tam giác DIF và diện tích tam giác ABC Giúp mk nha

Nêu và phân tích nội dung Hội nghị Muy-ních trong chiến tranh thế giới thứ hai (1939- 1945)?

Complete the second sentence so that it means the same as the first one. 1. James is hard-working and smart. James isn’t …………………… 2. Are there four windows in her room ? Does ………………………………………………………………………………. 3. There isn’t a living room, a kitchen, a bathroom and two bedrooms in my house. My house ……………………………………….………………………………… 4. How old is your father ? What is …………………………………………..………………….…………….. 5. My address is 20 Tran Phu Street. I…………………………………………………………………………………….. 6. Kate has round blue eyes.  Kate’s eyes………………………………………………………………………… 7. What is the price of these apples ?  How much…………………………………………………………….…………..? 8. She has full lips. Her lips………………………………………………………..……………………. 9. The table is under the bookshelf. The bookshelf……………………………………………………………………… 10. I don't watch TV in any other rooms but the living room. I only ……………………………………………………………………………….

Read the passage and decide which answer A, B, C or D best fits each space When a volcano (78)________, hot gases and melted rock from deep within Earth find (79)________ way up to the surface. This material may (80)________ slowly out of a crack in the ground, or it may explode suddenly into the air. Volcanic eruptions may be very (81)________. But they can (82)________ create new landforms. Of the nearly 1,900 volcanoes active today, or known to have been active in (83)________ times, about ninety per cent can be found in the (84)________ of South America, North America, Asia, and Oceania that are close (85)________ the Pacific Ocean. When marked on a map of the world, this line of volcanoes looks a bit (86)________ a vast, open circle. For this (87)________ it is known as the ring of fire. Adapted from Britannica Elementary Library, Encyclopaedia Student and Home Edition. Chicago: Encyclopaedia Britannica 2011 78 A. erupts B. throws C. blows 79 A. them B. they C. their 80 A. leave B. come C. flow 81 A. destruction B. destructive C. destroy 82 A. also B. too C. so 83 A. historically B. historical C. history 84 A. pieces B. ways C. areas 85 A. with B. at C. to 86 A. as B. like C. so 87 A. reason B. aim C. condition

Đặt câu cảm thán với một kỷ niệm!

Tại sao nói Đại hội III (1960) của Đảng đã hoàn chỉnh đường lối cách mạng chung của cách mạng Việt Nam trong giai đoạn mới?

nêu suy nghĩ về sự kỳ thị, hắt hủi người gốc Á trên khắp thế giới và nỗi lòng của những người bị gọi là "virus độc hại"