Giải thích các bước giải:
Bài 1:
Ta có $M$ nằm giữa $A,B\to OM$ nằm giữa tia $OA,OB$
$\to M$ nằm trong $\widehat{AOB}$
Bài 2:
Ta có tia $OA$ nằm giữa tia $Ox,Oy$
$\to A$ nằm trong $\widehat{xOy}$
Trong hệ trục tọa độ Oxy cho phương trình đường thẳng:3x + 4y = 2 (d) a) Tìm hệ số góc của đường thẳng (d). b) Với giá trị nào của m thì đường thẳng d’ : y = ( m2 -1)x + m song song với đường thẳng d .
Phấn viết được đựng trong cái hộp có chiều cao 6cm , đáy hộp là hình vuông có cạnh 12cm . Người ta xếp các hộp phấn vào các thùng có chiều dài 1,8m , chiều rộng 1,2m và chiều cao 0,3m . Hỏi để xếp hết 204800 hộp phấn đó vào các thùng ta cần ít nhất bao nhiêu cái thùng ? GIÚP MÌNH NHA .
Giúp em câu 81 82 có lời giải với ạ
Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in theposidon ofprim mystress in each of the following questions. Question 1. A. collect B. attack C. rubbish D. prefer Question 2. A. biology B. ignorance C. national D. educate Mark the letter A, B, C or D on your answer sheet to indicate the word that CLOSEST in meaning to the underlined word(s) in each of the following questions. Question 3. Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness A. record B. shine C. categorize D. diversify Question 4. The augmentation in the population has created a fuel shortage. A. increase B. necesity C. demand D. decrease Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. Question 5. Although some societies are ____ undeveloped, their languages from linguist's point of view are very complex. A. technology B. technologically C. technological D. technologist Question 6. The plane ____ down 20 minutes later than scheduled because of the bad weather. A. put B. flew C. landed D. touched Question 7. British and Australian people share the same language, but in other aspects they are as different as ____. A. cats and dogs B. chalk and cheese C. salt and pepper D. here and there Question 8. There is ____ in my bedroom. A. a square old wooden table B. an old wooden square table C. an old square wooden table D. a wooden old square table Question 9. The man got out of the car, _____ round to the back and opened the boot. A. walking B. walked C. walls D. walk Question 10. It is imperative ____ what to do when there is a fire. A. he must know about B. that everyone know C. we knew D. that he knew Question 11. At this time of the year the number of students in the university tends to ____. A. dwindle B. deteriorate C. reduce D. lessen Question 12. The prisoner is thought _______ by climbing over the wall. A. to escape B. has been escaped C. to have escape D. has escaped Question 13. Buckingham Palace is a major tourist ____ in London. A. attract B. attraction C. attractive D. attractiveness Question 14. John asked me ____ that film the night before. A. that I saw B. had I seen C. if I had seen D. if had I seen Question 15. It gets ____ to understand what the professor has explained. A. the more difficult B. difficult more and more C. more difficult than D. more and more difficult
1.Cho tam giác ABC có AB=8cm,AC=12cm.Trên cạnh AB lấy điểm D sap cho BD= 2cm.Trên cạnh AC lấy điểm E sao cho AE=9cm. a,tính tỉ số AE/AD;AD/AC b,CM;tam giác ADE đồng dạng với tam giác ABC c,Đường phân giác của góc BAC cắt BC tại I.CM:IB.AE=IC.AD 2.Cho tam giác ABC,trung tuyến AM,ccs tia phân giác của các góc AMB,AMC cắt AB,AC lần lượt tại D,E a,CM;DE//BC b,cho BC=6cm,AM=5cm,tính DE?
-80+(-80)+(-80)+...+(-80)=? (có 80 số -80)
Read the passage and write T or F (1pt) Nam is in grade 8A. He has received his report card for the last school year. He got good grades for Literature and Math, but his English was poor. His English teacher said, “Nam, you must work harder on your English”. He’ll try his best to study well next year. He loves studying and he likes sports, too. He enjoys playing soccer a lot. Next summer vacation, he will enroll for the summer activities in his home town. They’ll plant trees, clean the streets and participate in the city's sport programs. 1. Nam is in grade 8A. 2. His English was excellent. 3. He ought to work harder on his English 4. This summer vacation he is going to clean his school.
giải pt nghiệm nguyên 26+2a+b=0
giúp mk bài này nha : miệng giếng là 1 hình tròn có bán kính 0,6 m, bao quanh miệng giếng có xây thành giếng rộng 0,2 mét.tính diện tích của thành giếng mk đg cần gấp ạ
Đố mn biết toy lớp mấy ? ( tìm hiểu kĩ đê, k phải lớp 6 đou, có thể vào trang cá nhân ) Vẽ anime Loay hoay hoặc anime vui cười
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