Cho tam giác ABC có đường phân giác BM .Qua A kẻ đường thẳng vuông góc với AB cắt BM tại N ,cắt BC tạ E

a, CM △ANC cân và NC⊥BC

b, XĐ dạng của △BNE

c, CM NC là đường trung trực của BE

d, Cho AB=10cm ,tình S△BNE

LÀM HỘ MÌNH CÂU D THÔI............

Cho tam giác ABC có AB=3cm, AC=4cm, BC=5cm

a/ tam giác ABC là tam giác gì? Vì sao

b/ Kẻ AH vuông góc với BC( H thuộc BC). Gọi AD là phân giác góc BAH(D thuộc BC). Qua A vẽ đường thăng song song với BC , trên đó lấy 1 điểm E sao cho AE =BD( E và C cùng phía đối với AB)
Cm: DE=AB

c/ Cm: tam giác ADC cân

d/ gọi m là trung điểm của AD, I là giao điểm của AH và DE.

Cm: 3 điểm C,I, M thẳng hàng

Bạn Nguyễn Lê Quỳnh Phương bạn đã biết giải bài nay chưa nói cho mình với

Cho tam giác ABC vuông tại A ,BC=15cm,\(\dfrac{AB}{AC}=\dfrac{3}{4}\).Tia phân giác góc C cắt AB tại D .Gọi E là hình chiếu của D trên BC

a, CM CD là đường trung trưc của AE

b. Tính AB,AC

c, Trên tia AB lấy điểm F sao cho AF =AC .Kẻ tia Fx vuông góc với AF cắt tia DE tại M .Tính góc DCM

1/Talk about your favorite job in the future

2/Talk about some keys to have a successful job interveiw

3/Would you like to have a part -time job ?If so ,what do you do?

4/It is said that women should stay at home to look after their family after they get married.Do you disagree or agree?

5/Do you have an after-school job

HEPL ME.....

câu hỏi ôn tập sử học kì 2

Cho △ABC có AM, BN, CE là đường trung tuyến CM :\(\dfrac{3}{4}\)(AB+BC+AC)∠AM+BN+CE∠AB+BC+AC

Tìm GTNN của B=\(\dfrac{20-b}{2020-b}\)với b thuộc Z

I. Choose the most suitable tense.

1. Why (are you going to buy/ will you buy) a new mountain bike?

2. Don’t phone between 8.00 and 9.00. I’ll study/ I’ll be studying then.

3. Look out! That tree (will fall/ is going to fall)!

4. Let me know as soon as Louise (will get/ gets) here.

5. Great news! Jean and Chris (will come/ are coming) to stay with us.

6. According to this timetable, the bus (is going to arrive/ arrives) at 6.00.

7. I have a feeling that something strange (is going to happen/ is happening) in a minute.

8. The doctor says I (will have/ am going to have) a baby!

9. Can you call me at 7.00, because (I’ll leave/ I’m leaving) tomorrow.

10. If you arrive late at the sale, the best things (will go/ will have gone).

II. Give the correct form of the verbs:

1. I can’t see you on Thursday afternoon. I (visit) our Birmingham branch.

2. George (not be) back until six. Can I take a message?

3. What (you/ buy) with the money you won in the lottery?

4. I don’t think you (have) any problems at the airport.

5. (You/ take) your dog with you to Scotland?

6. Can you answer the phone for me? I (lie down) for a while.

7. All the hotels are full. Where (we/ spend) the night?

8. You’d better not come in July. My mother (stay) with me then.

9. What time (your plane/ leave) ?

10. Leave the car here. May be the police (not/ notice) it.

III. Give the correct form of the verbs:

1. By the time we reach the home, the rain (stop).

2. This time next week I (lie) on the beach in Spain.

3. In ten years’ time I (work) for a different company.

4. If we don’t get there by 6, Jack (leave).

5. In July they (be married) for ten years.

6. In the year 2500 a lot of people (live) on the moon.

7. When you get to the station, I (wait) for you outside.

8. Don’t worry! The plane (land) in a moment.

9. By the time you come home, I (finish) the decorating.

10. Come round between eight and nine. We (watch) the match on television then.

V. Put each verb in brackets into a suitable tense. All sentences refer to future time.

1. When I (see) you tomorrow, I (tell) you my news.

2. As soon as we (get) there, we (phone) for a taxi.

3. I (go) to the library before I (do) the shopping.

4. We (wait) here until the rain (stop).

5. I (get) some money from the bank when it (open).

6. After you (take) the medicine, you (feel) better.

7. You have to stay until you (finish) your work.

8. I (let) you work the minute I (hear) the results.

9. Before we (paint) the wall, we (have) a cup of tea.

10. We (climb) over the wall as soon as it (get) dark.