Bài 3. (3,0 điểm) Cho tam giác ABC vuông tại A (AB < AC). Vẽ AH L BC (H ∈ BC). Lấy điểm D thuộc tia
đối của tia HẠ sao cho HD = HẠ.
a) Chứng minh rằng AABAH = AABDH và tia BC là tia phân giác của góc ABD.
b) Qua D vẽ đường thẳng song song với AB, cắt BC tại M và cắt AC tại K. Chứng minh rằng AD là đường
trung trực của đoạn thẳng BM.
c) Vẽ đường thăng CN vuông góc với đường thẳng AM (N € AM). Chứng minh ba điểm C, N, D thẳng hàng.
cảm ơn bạn nhiều
V. Rewrite the sentence so that the meaning stays the same as the first one
1. We don't try to save our sources of energy. They end soon.
- If......
2. It's a good idea to reuse old bottles to make things for our project.
- We should. ...
3. Our school have many tall trees.
-There
4. This is the first time I have visited Literature Temple.
- I have never....
5. It is my sister's eighteen birthday next week.
-My sister will...
1. My father is interested in watching television
→My father likes...
2 We will plant more trees. The air will be fresher
- If.....
3. The Nile is the longest river in the world.
→No rivers......
4. I have never been to Ha Long Bay before.
→This is the first time I have
5. There are 42 classes in our school
→Our school.
IV. Rearranges the words to make complete sentences 1. and /Linh/their / visited/ grandparents/ last/ weekend/ Tam.
2. We/have/do/robots/ in/will/ future/ housework/to/ the/.
3. she/ gets/ If/ up/, /the/ she/ not/ miss/ train/ early/will/
4. might/go/ We/ the / Moon/ the/ future/on/in/to.
5. we/recycle/ If/ paper/, / of /will/we/ a/ save/ lot/ trees. -
1. recycle/ the environment /bottles and cans/help/,/we/will / If we/
2. My younger sister /never/ been/ has/ before/ to/Ho Chi Minh City/
3. What / of/ will / live / in / future / the/you/ house / type /?
4. ocean / My / the / will/future / located / house / be / on /.
.If/cycle/more people/, will be /there/ pollution / less air / mooning stays the same as the first on