Dear lily,

Hope you're doing well, I just wanna to share with you something about my neighbourhood. I live in Vinh yen, it's a city near Hanoi, so it's quiet crowded and bustling. There are many people in my neighborhood but we don't usually talk, I think everyone is too busy and hard-working, they just don't have time for a chat. There are many mordern building, our streets always clean and beautiful, thanks to the diligent cleaners. There also a big library where I often go there at weekend, a large park with lots of high trees and flowers where families come to relax, children can play well. There are also communal facilities such as exercise machines that everyone can use. Living our neighborhood is very convenient and has many amenities. Even though our people don't communicate much, in general we are still very friendly with each other. I think living in my neighborhood is great.

take care,lily

leeanh

Dear [...] vd lily,

Hope you're doing well, I just wanna to share with you something about my neighbourhood. I live in [......], it's a city near [.......], so it's quiet crowded and bustling. There are many people in my neighborhood but we don't usually talk, I think everyone is too busy and hard-working, they just don't have time for a chat. There are many mordern building, our streets always clean and beautiful, thanks to the diligent cleaners. [ There also a big library where I often go there at weekend, a large park with lots of high trees and flowers where families come to relax, children can play well. There are also communal facilities such as exercise machines that everyone can use. ]--đoạn này bạn có thể thay bằng nhiều cái khác nữa-- Living our neighborhood is very convenient and has many amenities. Even though our people don't communicate much, in general we are still very friendly with each other. I think living in my neighborhood is great.

take care,[....](vd như) lily

[yourname]

Dear [...] vd lily,

Hope you're doing well, I just wanna to share with you something about my neighbourhood. I live in [......], it's a city near [.......], so it's quiet crowded and bustling. There are many people in my neighborhood but we don't usually talk, I think everyone is too busy and hard-working, they just don't have time for a chat. There are many mordern building, our streets always clean and beautiful, thanks to the diligent cleaners. [ There also a big library where I often go there at weekend, a large park with lots of high trees and flowers where families come to relax, children can play well. There are also communal facilities such as exercise machines that everyone can use. ]--đoạn này bạn có thể thay bằng nhiều cái khác nữa-- Living our neighborhood is very convenient and has many amenities. Even though our people don't communicate much, in general we are still very friendly with each other. I think living in my neighborhood is great.

take care,[....](vd như) lily

[yourname]

Dear [...] vd lily,

Hope you're doing well, I just wanna to share with you something about my neighbourhood. I live in [......], it's a city near [.......], so it's quiet crowded and bustling. There are many people in my neighborhood but we don't usually talk, I think everyone is too busy and hard-working, they just don't have time for a chat. There are many mordern building, our streets always clean and beautiful, thanks to the diligent cleaners. [ There also a big library where I often go there at weekend, a large park with lots of high trees and flowers where families come to relax, children can play well. There are also communal facilities such as exercise machines that everyone can use. ]--đoạn này bạn có thể thay bằng nhiều cái khác nữa-- Living our neighborhood is very convenient and has many amenities. Even though our people don't communicate much, in general we are still very friendly with each other. I think living in my neighborhood is great.

take care,[....](vd như) lily

[yourname]

Dear [...] vd lily,

Hope you're doing well, I just wanna to share with you something about my neighbourhood. I live in [......], it's a city near [.......], so it's quiet crowded and bustling. There are many people in my neighborhood but we don't usually talk, I think everyone is too busy and hard-working, they just don't have time for a chat. There are many mordern building, our streets always clean and beautiful, thanks to the diligent cleaners. [ There also a big library where I often go there at weekend, a large park with lots of high trees and flowers where families come to relax, children can play well. There are also communal facilities such as exercise machines that everyone can use. ]--đoạn này bạn có thể thay bằng nhiều cái khác nữa-- Living our neighborhood is very convenient and has many amenities. Even though our people don't communicate much, in general we are still very friendly with each other. I think living in my neighborhood is great.

take care,[....](vd như) lily

[yourname]

Dear [...] vd lily,

Hope you're doing well, I just wanna to share with you something about my neighbourhood. I live in [......], it's a city near [.......], so it's quiet crowded and bustling. There are many people in my neighborhood but we don't usually talk, I think everyone is too busy and hard-working, they just don't have time for a chat. There are many mordern building, our streets always clean and beautiful, thanks to the diligent cleaners. [ There also a big library where I often go there at weekend, a large park with lots of high trees and flowers where families come to relax, children can play well. There are also communal facilities such as exercise machines that everyone can use. ]--đoạn này bạn có thể thay bằng nhiều cái khác nữa-- Living our neighborhood is very convenient and has many amenities. Even though our people don't communicate much, in general we are still very friendly with each other. I think living in my neighborhood is great.

take care,[....](vd như) lily

[yourname]

Dear [...] vd lily,

Hope you're doing well, I just wanna to share with you something about my neighbourhood. I live in [......], it's a city near [.......], so it's quiet crowded and bustling. There are many people in my neighborhood but we don't usually talk, I think everyone is too busy and hard-working, they just don't have time for a chat. There are many mordern building, our streets always clean and beautiful, thanks to the diligent cleaners. [ There also a big library where I often go there at weekend, a large park with lots of high trees and flowers where families come to relax, children can play well. There are also communal facilities such as exercise machines that everyone can use. ]--đoạn này bạn có thể thay bằng nhiều cái khác nữa-- Living our neighborhood is very convenient and has many amenities. Even though our people don't communicate much, in general we are still very friendly with each other. I think living in my neighborhood is great.

take care,[....](vd như) lily

[yourname]

Dear [...] vd lily,

Hope you're doing well, I just wanna to share with you something about my neighbourhood. I live in [......], it's a city near [.......], so it's quiet crowded and bustling. There are many people in my neighborhood but we don't usually talk, I think everyone is too busy and hard-working, they just don't have time for a chat. There are many mordern building, our streets always clean and beautiful, thanks to the diligent cleaners. [ There also a big library where I often go there at weekend, a large park with lots of high trees and flowers where families come to relax, children can play well. There are also communal facilities such as exercise machines that everyone can use. ]--đoạn này bạn có thể thay bằng nhiều cái khác nữa-- Living our neighborhood is very convenient and has many amenities. Even though our people don't communicate much, in general we are still very friendly with each other. I think living in my neighborhood is great.

take care,[....](vd như) lily

[yourname]

Dear [...] vd lily,

Hope you're doing well, I just wanna to share with you something about my neighbourhood. I live in [......], it's a city near [.......], so it's quiet crowded and bustling. There are many people in my neighborhood but we don't usually talk, I think everyone is too busy and hard-working, they just don't have time for a chat. There are many mordern building, our streets always clean and beautiful, thanks to the diligent cleaners. [ There also a big library where I often go there at weekend, a large park with lots of high trees and flowers where families come to relax, children can play well. There are also communal facilities such as exercise machines that everyone can use. ]--đoạn này bạn có thể thay bằng nhiều cái khác nữa-- Living our neighborhood is very convenient and has many amenities. Even though our people don't communicate much, in general we are still very friendly with each other. I think living in my neighborhood is great.

take care,[....](vd như) lily

[yourname]

Xét tam giác \(O C D\) có \(A B / / C D\) (giả thiết) và \(A B\) cắt \(O C ; O D\) lần lượt tại \(A ; B\).

Theo hệ quả của định lí Thales ta có:

\(\frac{O A}{O C} = \frac{O B}{O D} = \frac{A B}{C D} \Rightarrow \frac{O A}{O C} = \frac{O B}{O D} \Rightarrow O A . O D = O B . O C\)  (điều phải chứng minh).