cho tam giác ABC vuông tại A,có AB=6cm,AC=8cm.kẺ ĐƯỜNG CAO AH tia phân giác góc HAc cắt bC tại D,DK vuông góc với AC a.cHƯNG MINH TAM GIÁC BAD cân b.Tia phân giác góc BAH cắt cạnh BC tại E CM:AB+AC=BC+DE

Giúp minhf nha ai có nhóm cho vào với ạ

Giúp mình câu a,b vs ạ. Mình gấp lắm. Mình vote 5*

giúp em nhé!!!! hứa cho ctlhn ạ và 5 sao

Có bao nhiêu chất không phải chất điện li dưới đây :

Past simple tense Dấu hiệu : 1-last 2-ago 3-in +năm đã qua 4. yesterday + S ED/CỘT 2 - Đặt did trước not ? đảo did lên đầu Wh đặt did trước S NOTE : is /am-was Are-were 1- She (eat)fish yesterday 2- They(play )chess a year ago ? 3- Where they(learn) last year? 4- I (not go) to school a year ago Ex2 : 1- They (be) in HN yesterday 2- THEY(not be)in HN last week 3- They(be)in HN a year ago? 4- Where they(be) last summer ? Ex3 1. I _____ at my mom’s home yesterday. (stay) 2. Hannah ______ to the theatre last Sunday. (go) 3. I and my classmates ______ a great time in Da Nang last year. (have) 4. My holiday in California last summer wonderful. (be) 5. Last January I _____ Sword Lake in Ha Noi. (visit) 6. My grandparents _ very tired after the trip. (be) 7. I _____ __ a lot of gifts for my older brother. (buy) 8. James and Belle _______ sharks, dolphins and turtles at Vinpearl aquarium. (see) 9. Gary _____ chicken and rice for lunch. (eat) 10. We ____ about their holiday in Ca Mau. (talk)

Các bạn hãy dịch và xác định thì trong dấu ngoặc và xác định kiểu câu 1'ihave something to show you'I said to her 2'i'mgoing away tomorrow,mother'he said 3'we have alift but very often it doesn't work,'they said 4'He said:'My wife has just been made a judge' 5'Idon't think your father likes me,'the young wife said 6'Do puppies travel free?'adog owner asked 7'Which team has won ?'asked Ann 8'Why does the price go up so often?'she said to me 9'Is a return ticket cheaper than two singles?'said my aunt 10'DO you want to buy any secondhand books?'said Bill \

Cho tam giác DEF vuông tại D. DE=12,EF=20.Kẻ đường cao DH a)cm: FD.ED=FE.DH b)Tính DF, EH,HF? c) kẻ HN vuông góc với DE tại N, HM vuông góc với DF tại M. Cm:tam giác DMN đồng dạng tam giác DEF

Exercise 12: Past Simple or Present Perfect: Give the correct form of the verbs. 11. The police................................ two people early this morning. (to arrest) 12. My bicycle isn’t here. I think someone................................ it. (just take) 13. Dan................................ two tablets this year. (already/to buy) 14. How many games................................ so far this season? (your team/to win) 15. ................... the CN Tower when you................... in Toronto? (you/to visit - to stay) 16. ................................ your homework yet? - Yes, I................................ it an hour ago. (you/to do - to finish) 17. There ................................an accident in High Street, so we have to use King Street to get to your school. (to be) 18. I................................ Peter since I................................ last Tuesday. (not/to see - to arrive) 19. Frank............................... his bike last May. So he............................... it for 4 months. (to get - to have) 20. I’m sorry, I................................ earlier, but I................................ a lot lately. (not/to write - to work)

Exercise 11: Give the correct form of the verbs in brackets. Film maker George Richards (1. be)........................... interested in the cinema since he (2. be)........................... a small child. He (3. make)............................ his first film when he (4. be)......................... just twelve years old. He is now almost forty and he (5. make) ......................... thirty films. George loves travelling. His work (6. take)......................... him all over the world. He (7. be)......................... to Africa, India, Australia, China, the USA and South America. Last year, he (8. visit)......................... Russia for the first time. George is married to the singer Kathy Burke. They (9. be)......................... married for ten years. They live with their two children on the Greek island of Kos. They (10. buy)......................... a house on the island in 1987 and they are still living there.