tìm câc số nguyên n sao cho a² + 1 chia hết cho n+1

cho hình thang cân ABCD (AB//CD) có đường chéo AC vuông góc AD . KẺ đường cao AH biết HD=12;HC=25;AD=13

a, C/M tam giác HAD đồng dạng với tam giác ACD

b, tính diện tích hình thang

Cho hình thang ABCD có đường chéo vuông góc với cạnh bên. kẻ đường caoAH biếtDH=5;CH=15

a, tính độ dài 2 đường chéo

b,tính đường cao AH

C, tính diện tích của hình thang ABCD

viết chương trình nhập vào 1 mảng số nguyên sau đó đếm xem có bn số chia hết cho 5 trong dãy số đã nhập?

IX. Write a letter with cues.

1. thank you/ letter/ I/glad/ hear/ you/ have/ enjoyable/ Teacher’s day.

2. I/ receive/ first semester report/last week.

3. I/get/ good/ grades/ English and chemistry/ geography/ but/ math and history/ be/ bad.

4. My teacher/ ask/ improve/ math and history.

Dear Nam,

Thank you

………………………………………………………………………………………………………………………………………………………………………………………………………………………………......................................................................................……………………………………………………………………………………………………..........................................................

Write soon and tell me all your news.

Love,

X. Write a letter with cues. Dear Mom and Dad

1. I/ glad/ tell/you/that/I/going/have/an interesting plan .

................................................................................................................................

2. I/ go/ to/ join/ the Y& Y Green group/ my school.

................................................................................................................................

3. We/ going/ clean/ the banks of the lakes/ weekends.

................................................................................................................................

4. And we/ plant/young trees and plants/sell/ other schools.

................................................................................................................................

5. We hope/ give/ more green color/ the city/ and earn some money/ our school Y&Y

................................................................................................................................

6. Write/ me soon/ tell me/ all your news

................................................................................................................................

In the first year of lower secondary school, I had some difficulties in learning English.

My English pronunciation was really bad and my English grammar was worse. I did

not know how to improve them. I didn’t want my father and mother to know about this.

One afternoon after the lesson, my teacher of English told me to wait for her outside

the classroom. She took me to the school library and showed me cassettes of

pronunciation drills kept in a glass bookcase. She also told me how to use an English-

English dictionary to improve my English grammar. “Now I think you know what you should do”, said she. I made much progress and only one year later, I won the firstprize in the English Speaking Contest 1 answer The question

a, Who wanted to meet Nam one afternoon after the leson? ..........................................................................................

b, what đi she tell him to improve his english grammer?

........................................................................................

VIII. Complete the second sentences so that it has the same meaning to the first one. 1. You should go to the dentist, my friend said⇒. My friend said …………… 2. Send a postcard to me, Lan said to me⇒ Lan told me……………………………. 3. Nam doesnt enjoy playing badminton. ⇒Nam isnt......……………………………………………………………………… 4. He is a good baseball player.⇒ He plays ……………………………………………………………………….. 5. Miss Jackson said to Tom, You should spend more time on English pronunciation .⇒ Miss Jackson said …….……… 6. My teacher said You should practice speaking English everyday.⇒ My teacher said ….………………… 7. My mother said Please turn down the radio. ⇒My mother asked me………………………………… 8. Nga asked Could you take these pictures to my room? ⇒Nga told me ………………………………………………………9. Lan said to Hung: Please wait for me outside my school. ⇒Lan said ................................................................................. 10. Can you give me a handHe told me⇒ ................................................................................................................... 11. We should speak English fluently The boys said that⇒......................................................................................................... 12. Please open your book Nam said to Hoa.⇒ Nam asked ………………………………………………… 13. You should practice speaking English more Nga said to me.⇒Nga told................................................................................ 14. The doctor said to him, Do morning exercises very often.⇒ The doctor asked him............................................................... 15. Shut the door behind you!, his aunt said to him. ⇒...............................................................................................................