Giải thích các bước giải:
a)Theo đề :Góc D = 45 độ = > CDB = 45 độ (đối đỉnh )
= > a//b ( đồng vị)
b) Mà c vuông góc với AB = > b vuông góc với AB
Chúc bạn học tốt
I. Choose the correct word A, B, or C for each gap to complete the following letter. Dear Minh, Hi. I’m your exchange student (1) _____________ England. My name is George and I’m 12 years old. I (2) ______________ with my parents and my two sisters in Bournemouth, a town on the south coast of England. I’m a student at Lidborough School. It’s small (3) ______________ it is very clean and nice. My best (4) _______________ is probably computer studies and my worst is math. What about you? What are your (5) ________________ subjects at school? I’m really looking forward (6) ________________ visiting you in Viet Nam and meeting your family. What kind of (7) ________________ do you go to? What’s your school like? Please write soon and send me a (8) ___________ of your school. Best wishes, George Kelp 1. A. in B. from C. of 2. A. live B. come C. like 3. A. with B. as C. but 4. A. subject B. lesson C. play 5. A. favorite B. like C. dislike 6. A. at B. in C. to 7. A. class B. school C. classroom 8. A. painting B. drawing C. photo
Tìm x $2\sqrt{3}-\sqrt{4+x^2}=0$ $3\sqrt{2x}+5\sqrt{8x}-20-\sqrt{18x}=0$
Vẽ bảng chữ cái cali trên medibang / hoặc jump paint cho mềnh 30 điểm nha có tâm
mn ơi giúp mik vs mik đang cần rất rất gấp ạ. 20 phút nx mik cần có giúp mik nhé. ko spam.
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Timf x bieets: a) $2\sqrt{3}-\sqrt{4+x^2}=0$ b) $3\sqrt{2x}+5\sqrt{8x}-20-\sqrt{18x}=0$
Find and correct the mistake 1.He surprised by the loud noise. 2. They were ate dinner at six o'clock. 3. Was your car fix? 4. This photo was take by my uncle. 5. Who was cooked dinner? 6. When did the airplane invented? 7. He was watched his favorite TV show. 8. Robert was bite by a dog. 9. They were interview by a reporter. 10.I'm sorry. You are not allow to go inside. 11. Pluto discovered in 1930. 12. Why did the party cancelled? 13. I was really enjoyed my holiday last summer. 14. My friend wasn't careful. She was fell off her bicycle. 15. The room cleaned this morning 16. When was the story write
ai làm gấp giúp mk vote 5 sao ạ!
Đốt cháy hoàn toàn 2,76 gam hỗn hợp X gồm CxHyCOOH, CxHyCOOCH3, CH3OH thu được 2,688 lít CO2 (đktc) và 1,8 gam H2O. Mặt khác, cho 2,76 gam X phản ứng vừa đủ với 30 ml dung dịch NaOH 1M, thu được 0,96 gam CH3OH. Công thức của CxHyCOOH là A. C2H5COOH B.CH3COOH C. C2H3COOH D. C3H5COOH
My grandmother had always wanted to watch Khanh Ly (PERFORMANCE) _______ live once, but she could never afford to.
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