Bài 4. Cho ABC cân tại A ; AB = 5cm; BC = 8 cm; đường cao AH.

a) Tính AH.

b) Trung tuyến CM cắt AH tại G . Tia BG cắt AC tại N. C/m G  là trọng tâm ABC và NC = NA.

c) Chứng minh   AGM = AGN và tính GN.

Cho mik hình cả lời giải chi tiết với !!!

Ex3: Complete the sentences by using as...as; not... as; different... from.

1. Her daughter_______________________________ her. (beautiful)

2. That dog    ______________________ it looks, (not dangerous)

3. Schools in Viet Nam ________________ schools in the USA. (different)

4. These trees ________________________ those, (same)

5. His appearance ___________________ what I have expected, (different)

Ex2: Choose the best option to complete each sentence. Circle A or B.

 Ex1: Find the word which has a different sound in the part underlined. Read the words aloud.

1. A. animation                        B. female                            C. safely                              D. pavement

2. A. critic                                B. direct                               C. illegal                              D. sign

3. A. recommend B. seatbelt                      C. vehicle                            D. investigate

4. A. cooked                            B. booked                          C. talked                              D. naked

5. A. opened                            B. played                            C. wanted                            D. filled

    Coin collecting is one of the most popular  hobbies in the world. Most coin (1) _______ enjoy trying to have a complete (2)_____  of a country’s coins. Some people collect coins for pleasure; (3)_____ collect coins in order to sell them later. From coins, we can also (4) _______ something about certain famous people and events in a country’s (5) _______. Many beginning collectors go to the bank and buy coins. Then they (6) _______ coins for their collection.

1. A. collectors                    B. collecting                  C. collected                      D. collections

2. A. set                                B. sets                           C. collector                      D. place

3. A. another                        B. other                         C. others                           D. the other

4. A. teach                           B. learn                          C. give                             D older

5. A. history                        B. nature                        C. science                         D. geography

6. A. look                            B. see                             C. watch                           D. find

Ex3:  Rewrite these sentences, beginning each sentence with the given words.

1. There is beef and chicken in the menu.

The menu ………………………………………………………............................................

2. I like salad best .

 Salad is……………………………………………………………......................................

3. The market does not have any carrots. 

There………………………………………….......................................................................

4. I want some iced tea because I am hot.

I am hot ……………...……………………………………………........................................

5. My brother  enjoys playing the guitar in his free time

My brother’s hobby ………………………………………………….....................................             

6. This painting is more expensive than that one

 This painting is not as……………...…………………………….............................................  

7. My father doesn’t drink beer. My mother doesn’t drink beer.

My father doesn’t  drink beer  and……………...…………………….........................................

                Cho mik hình và lời giải chi tiết nha!!! Cảm ơn!