Giup mình với
K
Khách
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Những câu hỏi liên quan
NT
1
GN
GV Nguyễn Trần Thành Đạt
Giáo viên
7 tháng 8 2023
\(a,\widehat{aOn}+\widehat{mOn}+\widehat{mOb}=180^o\left(kề.bù\right)\\ \Leftrightarrow70^o+\widehat{mOn}+40^o=180^o\\ Vậy:\widehat{mOn}=180^o-\left(70^o+40^o\right)=70^o\\ b,Vì:\widehat{aOn}=\widehat{mOn}\\ Mà.tia.On.nằm.giữa.2.tia.Oa.và.Om.nên:\\ On.là.tia.phân.giác.góc.\widehat{aOm}\)
Giup mình với mình đang cần gấp
giup mình với mai mình thi rồi
31 tháng 8 2023
AF=FG=GC
=>AG=2/3AC
=>S ABG=2/3*S ABC
BE=ED=1/2AD
=>BE+ED=1/2AD+1/2AD=AD
=>BD=DA
=>D là trung điểm của AB
=>AD=1/2AB
=>BE=ED=1/4AB
AE=AD+DE=1/4AB+1/2AB=3/4AB
=>S AEG=3/4*S ABG=3/4*2/3*S ABC=1/2*S ABC
=>S BEGC=1/2*S ABC
AF=FG
=>AF=1/2*AG
=>S AEF=1/2*S AEG=1/2*1/2*S ABC=1/4*S ABC
AD=2DE
=>AD=2/3AE
=>S ADF=2/3*S AEF=2/3*1/4*S ABC=1/6*S ABC
=>s EDFG=S ABC(1/4-1/6)=1/12*S ABC
S BCGE-S DEFG=15cm2
=>S ABC(1/2-1/12)=15
=>SABC=15:5/12=36cm2
DT
15 tháng 9 2021
1. seeing
2. working
3. to meet
4. talking/ to finish
5. asking
6. not to speak
7. carrying
8. overhearing
9. writing/ waiting
10. to avoid/ being
11. giving/ to speak
12. going/ saying
13. to persuade/ to agree
14. sneezing/ sitting
15. driving/ being
16. to start/ looking
17. to show/ to use
18. making/ to do
19. remaining/ to help/ to stay
20. listening/ hearing
21. camping
22. to be
23. to speak
24. to pay
25. to meet
26. not trying/ to solve
27. being
28. hunting
29. to be
30. working
31. going
32. to do
33. to bring
34. working
35. to buy
36. to inform
37. studying
38. to buy
39. to be fed
40. working
GN
GV Nguyễn Trần Thành Đạt
Giáo viên
11 tháng 8 2023
\(Bài.7:\\ a,\dfrac{\left(-3\right)^{10}.15^5}{25^3.\left(-9\right)^7}=\dfrac{3^{10}.3^5.5^5}{\left(5^2\right)^3.\left(3^2\right)^6.3.\left(-3\right)}\\ =\dfrac{3^{15}.5^5}{-5^6.3^{14}}=-\dfrac{3}{5}\\ b,2^3+3.\left(\dfrac{1}{9}\right)^0-2^{-2}.4+\left[\left(-2\right)^2:\dfrac{1}{2}\right].8\\ =8+3.1-\dfrac{1}{4}.4+\left[4:\dfrac{1}{2}\right].8\\ =8+3-1+8.8\\ =11-1+64=10+64=74\)
GN
GV Nguyễn Trần Thành Đạt
Giáo viên
11 tháng 8 2023
Bài 10:
\(a,3^{35}=\left(3^7\right)^5=2187^5\\ 5^{20}=\left(5^4\right)^5=625^5\\ Vì:2187^5>625^5\left(Vì:2187>625\right)\\ \Rightarrow3^{35}>5^{20}\\ b,2^{32}=\left(2^4\right)^8=16^8\\ Vì:37^8>16^8\left(Do:37>16\right)\\ \Rightarrow37^8>2^{32}\)
14 tháng 12 2021
1 have just seen
2 have ever seen /isdefinitely
3 never use
4 has already seen
5 can probably get
I
1D-2C-3D-4D-5C-6a-7A-8D-9B-10C-11b-12B-13A-14C-15C-16C-17A-18C
II
1.How long have Mai live in city?
2.When did you start working in this school
3.Where are you going to take part in holiday?
4.What subject have they learn since they go to this school?
5.When will she be here?
6.When was Alexander Graham Bell born?
7.Why we mustn't let children play with match?
8.Where did Nga's Grandmother use to live ?
9.How did we use to go to school?
10.What did Mrs Jackson ask Tim'mother to give him?
Cảm ơn bạn