B
buithanhhuyenthuongtin
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
* điểm G là trọng tâm của tam giác ABC khi và chỉ khi GA+GB+GC
=0
*Điem G la trong tam cua tu giac ABCD KHI VA CHI KHIGA+GB+GC+GD=0@-)o=>
>-/
=(
|b-(|-)%%-:-*
|![Roll Eyes :rolleyes: :rolleyes:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![Mad :mad: :mad:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
o-+:-SS![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
CỐ GẮNG GIÚP MÌNH NHA
=0
*Điem G la trong tam cua tu giac ABCD KHI VA CHI KHIGA+GB+GC+GD=0@-)o=>
CỐ GẮNG GIÚP MÌNH NHA