Cho hai điểm A, D nằm trên cùng một nửa mặt phẳng bờ d, gọi B, C lần lượt là các điểm đối xứng của A qua d, chứng minh rằng ABCD là hình thang cân.

rút gọn biểu thức : A=(a+b)^3+(a-b)^3

chỉ cần làm câu d mấy câu còn lại ko cần làm

làm giúp mình với,ai làm xong trước mình sẽ chọn là câu trả lời hay nhất

Write an email to a friend about Tet holiday.

IV: Read, then complete the passage. Use the words provided. watch biggest islands natural better and Ha Long Bay is in Quang Ninh province. It has many (1) _and caves. The islands are named after things around us. In the bay, you can find Rooster (2)_ _Hen Island (Trong Mai island) and even Man’s Head island (Dau Nguoi island). You must take a boat ride around the island - it’s essential! Tuan Chau is the (3)_ ___island in Ha Long Bay. There you can enjoy great Vietnamese seafood. You can(4)____ __________ traditional dance. You can join exciting activities. Ha Long Bay is Viet Nam’s most beautiful (5)_ ___wonder.

Giúp mình. Nnikotejlohghjkkkhvcccbbb nnvvbk

“The monument associated with Bird Claw is Stelae 8. He carried a high-ranking name but no Tikal emblem” là gì? (Ko tra bằng Google Dịch và không tra bất cứ nào liên quan đến Google Dịch nha)

1. Are you a stamp ................................ ? A. collecting B. collector C. collect D. collecting 2. Getting to the village is a very ............................... journey. A. interesting B. interested C. interest D. interests 3. The weather is nice. Shall we .................... mountains this morning ? A. go B. travel C. come D. climb 4. The tourists spent nearly half an hour ........................ photos of the pagoda and the tower. A. catching B. to catch C. taking D. to take 5. I wish you ......................... us someday. A. visit B. will visit C. visited D. would visit 6. It rains heavily, .............................. I can’t go to the movies with you. A. and B. but C. because D. so 7. My father ..................... teaching in a small village 10 years ago. A. starts B. started C. has started D. is starting 8. Minh wishes he ................... a new bike. A. shall have B. has C. had D. will have 9. They got up quite late, ...................... they missed the bus. A. and B. but C. so D. because 10. Ba and Tam usually go fishing ...................... weekends. A. on B. in C. to D. from 11. Our little brother took a long nap from 1 p.m ....................... 4 p.m. A. till B. between C. at D. in 12. The competitions will take place ......................... 8 a.m and 12 a.m. A. from B. between C. up to D. at 13. The boys often go skiing ..................... winter. A. in B. at C. on D. from 14. Every Saturday, they play table tennis ................................ 9 p.m. A. till B. from C. on D.in 15. They have learnt English ............. many years. A. in B. from C. since D. for giúp mk với

anou....câu 18 đơn giản mà nhỉ?