Bài 4: (3 điểm) Cho ABC vuông tại A có AB = 5cm; AC = 12cm. a) Tính BC. Sau đó tính chu vi tam giác ABC. b) Vẽ tia phân giác của góc B cắt AC tại I.Qua I vẽ IH BC (H thuộc BC).Chứng minh ABI = HBI c) Trên tia BA lấy K sao cho BC=BK. Chứng minh 3 điểm H,I,K thẳng hàng

Em hay cho biết xu hướng phân bố dân cư hiện nay ở Bắc Mĩ ? Tại sao lại có xu hướng đó

Viết đoạn văn 200 chữ Tbay y/nghĩa của việc sống hai mươi bốn giờ / một ngày

Giúp mình câu này với!!! Women are responsible for taking care of the children. -> Women are responsible for looking...............

. Từ 1954 - 1960, nhân dân miền Nam đấu tranh chống Mĩ bằng phương pháp nào?mục tiêu? Kết quả?

Có 4 lọ không nhãn đựng riêng biệt từng dung dịch của 4 chất sau: HCl, NaCl, BaCl2, NaClO. Hãy nêu phương pháp hoá học nhận biết mỗi chất.

XIII. Rewrite these sentences so that the meaning in the second sentences stays the same as that in the first ones. (10pts). 1. Because Lan was sick, she did not go to school yesterday. Because of 2. The women could not enjoy the concert because of their headache Their headache prevented _______ 3. Listening to music at home is more interesting than going to the concert.  I prefer _______ 4. This girl is the most hardworking in our class.  No one _______ 5. The visitor spoke so quickly that we could not understand what she said.  The visitor spoke too _____ 6. Shall we go to BacGiang BigC supermarket tonight? Why________________________________________________________? 7. The play was so boring that we left in the interval.  We_____________________________________________________________________ 8. Minh started learning English 5 years ago. Minh has_________________________________________________________________ 9. Does his father like to play chess?  Is his ___________________________________________________________? 10. Tiepstudies English more carefully than Lan does.  Lan_____________________________________________________________________

Gong culture in the Central Highlands of Viet Nam has been recognized by UNESCO as a Masterpiece of the Intangible Heritage of Humanity. Gong culture covers five provinces of the Central Highlands: Kon Tum, Gia Lai, Dak Lak, Dak Nong and Lam Dong. The masters of gong culture are the ethnic groups of Bahnar, Sedang, Mnong, Coho… The Gong Festival is held annually in the Central Highlands. In the festival, artists from these provinces give gong performances, highlighting the gong culture of their own province. For the ethnic groups of the Central Highlands, gongs are musical instruments of special power. It is believed that every gong is the symbol of a god who grows more powerful as the gong gets older. Therefore, gongs are associated with special occasions in people’s lives, such as the building of new houses, funerals, crop praying ceremonies… The gong sound is a way to communicate with the gods. Answer the questions: 1. Where does Gong culture exist? ……………………………………………………………………………………………… 2. How often is the Gong Festival held? ……………………………………………………………………………………………… 3. What do artists do in the Gong Festival? ……………………………………………………………………………………………… 4. Are Gongs pieces of folk music? ……………………………………………………………………………………………… 5. Is the gong sound a way to communicate with the ancestors? ……………………………………………………………………………………………

các bn giải giùm mình câu 3 nha mình cảm ơn ro nó ko cs TV nên mình chọn bừa mong các bạn thông cảm cho mình nha

Cho pt : x ² - 2(m + 1)x + m ² + 3m = 0 a) Tìm m để pt có 2 nghiệm x1 x2 b) Trong trường hợp pt có 2 nghiệm x1 x2 - Tìm giá trị nhỏ nhất của bt A = x1 ² + x2 ²