Cho ∆ ABC vuông tại A có góc ABC =60• a, Tính số đo góc ACB b, Trên tia đối của tia AC lấy điểm D sao cho AD = AC. Chứng minh ∆ ABD = ∆ABC c, Vẽ tia Bx là tia phân giác của góc ABC . Qua C vẽ đg thẳng vuông góc vs AC, cắt tia Bx tại E . Tam giác BCE là tam giác j? Vì sao?

x^3+1=2 nhân vs căn bậc 3 của(2x-1)

giúp em all bài :D cảm ơn các bạn và anh chị nhiều

Giúp mình với bài 1,2 cảm ơn nhiều

Mọi người giúp mình câu 2,3 nhé. Cảm ơn mọi người

Giúp mk toan bộ mấy bai nay nha ! Mk đang cần gấp a! 🥺🥺🥺🙏🏻🙏🏻🙏🏻✍🏻✍🏻🤔

III. Supply the correct tense or form of the verbs 1. Don’t stay up too late or you (be) tired. 2. Elderly people (give) teenagers good advice. 3. Don’t forget (clean) your teeth after meals. 4. Of all my classmates. Minh’s the best at (learn) English. 5. It’s half past one now. We (study) Electrics in the classroom. At a quarter to two we (have) a short break. 6. When my father (be) young, he (take) morning exercises regularly. 7. You should (see) the dentist when you have a toothache. 8. One of the biggest library in the world (be) the Library of the Congress.

Tính diện tính các hình được tô màu cam

II. Circle the best option to complete each of the following sentences. 1. Thurday is ...........day of the week. (five / the five / fifth / the fifth) 2. What......awful weather ! I can’t go out. (a / an the / 0) 3. My father isn’t sporty. He ............plays sports. (never / sometimes / often / always) 4. Don’t work to much. You......now. (are relaxing / can relax / should relax / will relax) 5. Farmers have...........time off than workers do. (little / less / fewer / more) 6. Would you like to go out for a picnic with us ............? (Yes,I would / Yes,I will / Yes, I would love to / Yes, I want to go) 7. Nga has.......uncle in Ha Noi. He’s a dentist. He often wears ............uniform to work. ( a-a / an-a / a-an / an-an) 8. Students have two...........break each day. (twenty minutes / twenty minute / twenty-minute / twentieth-minute) 9. There is a restaurant..........the supermarket. (on the left / on the left of / to the left / to the left of) 10. I sent a letter to my pen pal-Tim ........month. (every / last / next / each) 11. Children are often scared........seeing the dentist. (of / in / at / about) 12. John is not Vietnamese but he often travels to VietNam. He is a ....... (teacher / mechanic / artist / tourist)

Bài 10. Cho tam giác ABC có AB=AC . Phân giác góc A cắt BC tại I. a) Chứng minh rằng tam giác ABI=tam giác ACI. b) Kẻ IH vuông góc AB tại H, kẻ IK vuông góc AC tại K. Chứng minh rằng IH=IK