Cho tam giác ABC vuông tại A , đường cao AH . lấy D đối xứng với H qua AB, E đối xứng với H qua AC , DH cắt AB tại M, HE cắt AC tại N

a, c/m 3 điểm D,A,C thẳng hàng

b, c/m BDEC là hình thang

d, c/m DE=MN+AH

giúp mk nha mn "help meeeee"

1. that girl is very intelligent.-> what

2. Remember to wait for me tomorrow -> Don't

3. you should stay in bed -> you ought

4. there is a telephone in her room -> her room

5. to leave medicine around the house is safe -> it is

giúp mk nha mk đg cần gấp lắm

I. write questions for the underlined parts in the following sentences.

1. Hung kings are the founders of our nation and they became the frist kings of our country. ->

2. 2\(^{^{ }nd}\) september has been the national day of Viet Nam since 1945. ->

3. Ha Nhi mainly worship their ancestors. ->

các ban giúp mk nha mk đg cần gấp

I. đăt câu hỏi cho câu trả lời

1. there are 54 ethnic groups ->

2. i have watched this film for times->

3. they have the meeting twice a months ->

4 . it took me ten hours to decorate this wall ->

5. it is about seven kilometers from the centre to the museum of ethnology ->

6. the yao peoples are famous for their elaborate costumes ->

7. the hani people live in lai chau and lao cai ->

giúp mk nha mk đg cần gấp

1. what is the price of these costumes ? -> how much

2. his brother spent two house doing his homewwork .(đặt câu hỏi )

3. ethnic minorites / still/ traditional / some/life/in/ways/mountains/their/the/keep/of

4. the cultural heritage of the ethnic peoples in việt nam is very rich .(đặt câu hỏi )

5. we were very busy at work day . we are not as busy as that everyday.

giúp mk nha mk đg cần gấp

1. Anita doesn't play the piano as well as Manel -> manels plays

2.life in the country is more peaceuful than life in the city (as ) ->

3. my house is bigger than your house -> your house

4. the new bed is larger than my old best (comfortable) ->

giúp mk vs mk đg cần gấp.