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ta có : $A+B+C=180^0$
mà $A=60^0$
$⇒60^0+B+C=180^0$
$⇒B+C=120^0$
vì $B=3C$
$⇒B=90^0;C=30^0$
$⇒$ góc $B$ vuông
$⇒$ tam giác $ABC$ là tam giác vuông
Câu 2: Phân tích những thuận lợi và khó khăn để phát triển nông nghiệp của Nhật Bản?
Tìm số nguyên x, biết: a)x – 2=-6 b)-5 <x<1 c)8 ⋮x và x > 0 d)12⋮ x và x < 0
Bài 3: Cho hình thang cân các đường cao a) Tứ giác là hình gì? b) Chứng minh c) Gọi là điểm đối xứng với qua . Các điểm và đối xứng với nhau qua đường thẳng nào? d) Xác định dạng của tứ giác e) Chứng minh rằng DH bằng nửa hiệu hai đáy của hình thang ABCD. g) Biết độ dài đường trung bình hình thang ABCD bằng 8 , 2 , 5 . cm DH cm AH cm = = Tính diện tích các hình ADH ABKH ABCE ABCD , , , .
đốt cháy hoàn toàn 2.7g nhôm trung bình chứa 3.2g ôxi tạo thành nhôm oxit a.viết PT Phản ứng b.chất nào còn dư trong phản ứng và khối lượng dư là bao nhiêu ?
Cấu tạo tế bào gồm những thành phần nào
Đâu là nguyên nhân cơ bản chứng tỏ cách mạng tư sản Pháp 1789 là cuộc cách mạng triệt để nhất? A: Thiết lập được nền cộng hòa tư sản. B: Cách mạng đạt tới đỉnh cao với nền chuyên chính dân chủ Giacobanh. C: Cách mạng thi hành nhiều biện pháp kiên quyết để trừng trị bọn phản cách mạng. D: Cách mạng lật đổ chế độ phong kiến, đưa giai cấp tư sản lên cầm quyền.
cho tam giác abc có,ab=4,5cm,bc=6cm và ac= 7,5cm. chứng tỏ tam giác abc là tam giác vuông
2/ Người ta thuê quét vôi bên trong một căn phòng hình hộp chữ nhật gồm tường và trần nhà. Phòng dài 12,5m ; rộng 4m và cao 3,2 m. Phòng có diện tích các cửa là 12,5m2 . Hỏi: a/ Diện tích cần quét vôi? b/ Trung bình, một mét vuông sơn nước là 15000 đồng. Hỏi số tiền phải trả để sơn nước căn phòng là bao nhiêu?
Chọn cụm từ phù hợp điền vào chỗ trống giúp mình với
1. Rewrite the following sentences as indicated. (WRITE THE WHOLE SENTENCE IN YOUR ANSWER) Although I was late, I didn’t miss the bus. ==> In spite of ____________ 2, Rewrite the following sentences as indicated. (WRITE THE WHOLE SENTENCE IN YOUR ANSWER) In spite of being in a hurry, I didn’t forget to lock the door. => Although ____________ 3. Rewrite the following sentences as indicated. (WRITE THE WHOLE SENTENCE IN YOUR ANSWER) Despite the rain, they went to the football match. => Although __________________ 4. Rewrite the following sentences as indicated. (WRITE THE WHOLE SENTENCE IN YOUR ANSWER) Although I wasn’t hungry, I ate the cake. => In spite of ____________ 5. Rewrite the following sentences as indicated. (WRITE THE WHOLE SENTENCE IN YOUR ANSWER) Despite hating rock music, she went to the rock concert. => Although _____________________________ 6. Rewrite the following sentences as indicated. (WRITE THE WHOLE SENTENCE IN YOUR ANSWER) Although it was snowing, they went shopping. ==> In spite of _____________ 7. Rewrite the following sentences as indicated. (WRITE THE WHOLE SENTENCE IN YOUR ANSWER) Although she knew the answer, she refused to help him. ==> Despite ____________ 8. Rewrite the following sentences as indicated. (WRITE THE WHOLE SENTENCE IN YOUR ANSWER) In spite of having a lot of money, she refuses to help the homeless. ==> Although _____________ 9. Rewrite the following sentences as indicated. (WRITE THE WHOLE SENTENCE IN YOUR ANSWER) Despite being the boss, she works as hard as her employees. ==> Although __________________ 10. Rewrite the following sentences as indicated. (WRITE THE WHOLE SENTENCE IN YOUR ANSWER) Although he isn’t a good student, he did well in the exam. ==> In spite of ___________________ 11. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) I don’t like running. I like swimming. (but) 12. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) I don’t like running. I like swimming. (although) 13. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) I got up late. I didn’t miss the bus. (Although) 14. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) I got up late. I didn’t miss the bus. (however) 15. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) The cat wasn’t hungry. We still fed it. (but) 16. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) The cat wasn’t hungry. We still fed it. (Although) 17. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) Selena finished the book. It was very thick. (but) 18. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) Selena finished the book. It was very thick. (although) 19. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) He bought that new car. It was very expensive. (however) 20. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) He bought that new car. It was very expensive.(although) 21. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) We couldn’t win the match. We played well. (but) 22. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) We couldn’t win the match. We played well.(although) 23. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) The questions were very difficult. We solved them easily. (Although) 24. Combine the sentences into one sentence with the words given. (Write the WHOLE sentence in your answer) The questions were very difficult. We solved them easily. (however)
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