Bài 2: Cho đường tròn ( O;R) và dây cung AB= R√2 a) Tính độ dài cung AB theo R b) Tính diện tích hình quạt tròn AOB

Giải giúp mình bài 2 nha. Mình sẽ vote 5 sao và CTLHN

mọi người làm hộ em bài này với ạ

Nhận ra các chất: CaO, BaO, K, P2O5 giúp mk nhanh với ạ

4. Rewrite the following sentences using infinitive phrase / clause: a. I came to this school so that I could learn English. (in order to) ………………………………………………………………………………………………………… b. Tom was playing very softly so that he wouldn’t disturb anyone. (in order not to) ………………………………………………………………………………………………………… c. Mr. Brown is going to the bank to borrow some money. (so that ) ………………………………………………………………………………………………………… d. Mary took her brother to school for him to learn English. (so that ) ………………………………………………………………………………………………………… e. Please shut the gate for the cows not to get out of the cowshed. (so that ) …………………………………………………………………………………………………………

I. Give the correct tense or form of the verbs in brackets 1. While I (take) _______ to Mrs. Brown, someone (walk) _______ into my room and (steal) _______my computer. 2. Mary (leave) _______ home before we (get) _______ to the store yesterday 3. He (thank) _______me for what I (do) _______ 4. He said he (visit) _______me the following day 5. By the time I (arrive) _______, the football match (already / start) _______ 6. Peter (leave) _______before we (come) _______, so we didn‟t meet him 7. After we (had) _______dinner, we (go) _______out for 2 walk 8. As I (cross) _______the road I (step) _______ on the banana skin and (fall) _______very heavily 9. Mai loves (play)______________the piano. 10. You(have) ______________lots of friends soon. 11. Students should (review)______________their work before the test. 12. We always (go)______________to the Nha Trang on vacation. 13. Children shouldn‟t (stay)______________ up late. 14. Next Sunday is Nga‟s birthday. She (invite)______________some her friend for her birthday party. 15. He enjoys (collect)______________stamps and coins

Giúp mik gấp mình cảm ơn mn nha

với các số 0,1 ,2 ,3,4 Lạp đc bao nhiêu số có 5 chữ số khác nhau bẳng 5 số trên

Mọi người giúp em với ạ Giải ra nha đừng chỉ chọn đáp án rồi thôi

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