Giúp e với ah, 23h56 phút là e phải nộp ròi ah
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
LN
14 tháng 10 2021
a, Giả sử: Cz // Ax // By
Do Cz // Ax \(\Rightarrow\widehat{A}+\widehat{C_1}=180^o\)(2 góc TCP)
\(\Rightarrow80^o+\widehat{C_1}=180^o\)
\(\Rightarrow\widehat{C_1}=180^o-80^o=100^o\)
Do Cz // By \(\Rightarrow\widehat{C_2}=\widehat{B}=35^o\)(2 góc so le trong)
Ta thấy: \(\widehat{ACB}=\widehat{C_1}+\widehat{C_2}=100^o+35^o=135^o\)
b, Do d // AC \(\Rightarrow\widehat{ACB}+\widehat{EBC}=180^o\)(2 góc TCP)
\(\Rightarrow135^o+\widehat{EBC}=180^o\)
\(\Rightarrow\widehat{EBC}=180^o-135^o=45^o\)
NV
Nguyễn Việt Lâm
Giáo viên
6 tháng 10 2021
\(\dfrac{a}{b}=\dfrac{c}{d}\Rightarrow\dfrac{a}{b}-1=\dfrac{c}{d}-1\Rightarrow\dfrac{a-b}{b}=\dfrac{c-d}{d}\)
\(\Rightarrow\dfrac{b}{a-b}=\dfrac{d}{c-d}\Rightarrow\dfrac{2b}{a-b}=\dfrac{2d}{c-d}\)
\(\Rightarrow\dfrac{2b}{a-b}+1=\dfrac{2d}{c-d}+1\)
\(\Rightarrow\dfrac{a+b}{a-b}=\dfrac{c+d}{c-d}\) (đpcm)
11 tháng 9 2023
Bài 5:
1. There are a few students taking part in the event
→ There aren't many students taking part in the event.
2. If he doesn't work hard, he will lose his job
→ Unless he works hard, he will lose his job.
3. Let's write about the three Rs ?
→ Why don't we write about the three Rs?
4. Learning about recyking is fun
→ It's fun to learn about recycling.
5. It's not good to throw old clothes away
→ You shouldn't throw old clothes away
Xếp từ thành câu
Bài 1
1. they / to / movies / do / how / go / the / often ?
→ How often do they go to the movies?
2. your eyes / swimming / should / when goggles / you / you / go / wear / to protect
→ When you go swimming, you should wear goggles to protect your eyes.
3. usually / his / swimming / with / friends / he / goes
→ He usually goes swimming with his friends.
4. go / do / weekend / on / always / fishing / parents / their ?
→ Do their parents always go fishing on the weekend?
5. camping / they / go / do / sometimes
→ Sometimes they go camping.
6. what / TV / you / do / on / sports / watch?
→ What sports do you watch on TV?
Bài 2
1. Our / important / an / sports and games / in play / lives / part
→ Sports and games play an important part in our lives.
2. players / how / match / there / in / many / are / football / a ?
→ How many players are there in a football match?
3. by / she / to keep / every day / tries / fit / jogging
→ She tries to keep fit by jogging every day.
4. yesterday / who / play / football / you / did / with ?
→ Who did you play football with yesterday?
5. sports / building / physical and strength / necessary / are / for
→ Sports are necessary for building physical strength.
6. to switch / before / go / don't / the TV / off / you / forget / to bed
→ Don't forget to switch off the TV before you go to bed.
7. Sunday / I / usually / friends / swimming / on / go / mornings / with / my
→ On Sunday mornings, I usually go swimming with my friends.
8. match / you / on / the / did / television / last night / watch / basketball / the ?
→ Did you watch the basketball match on television last night?
PT
1
