đổi 2m = 20dm

Diện tích xung quanh là:

(20+6) x 2 x 12 = 624(dm^2)

Diện tích toàn phần là:

624 + 20 x 6 x 2 = 864(dm^2)

ĐS: tự ghi

Quang Trung - Nguyễn Huệ là 1 bạn ạ 

-.-

quang trung và nguyễn huệ là 1 người mà

16 .B

17. D

18. A

19A

20 C

21 B

22 B

23 B

24 C

25 C

26 A

 27 A

28 A

lười thế

Bạn tham khảo nha

Teacher plays an important role in every child’s soul. To me, miss Dung-my head teacher. She taught literature from grade 10 to 12. She is tall, young, slim body with round face and bright smile. She is a devoted and responsible teacher as she always prepares carefully all the lessons before going to class. She teaches us the way to love people and becoming a good citizen for the country. Moreover, student love the way she teach, mark the score and correct the mistake. In my opinion, she is not only my teacher but she also works as my second mother at school. She helps student through thick and thin in life. Whenever facing up with any problem, I have no hesitation to share with her then she finds out the best solution or gives me some helpful advice. Additionally, if we don’t attend the class for some reasons, she immediately contacts us and asks whether we are fine. It seems that she spend her youth to learn and give deep knowledge to young generation and she really enjoys the job. Most of the time she spend for taking care of children from education to daily life. She is one of my idols because of her talent, personality and career. Therefore, almost student look up to her and thank her for kindness and responsibility.

đa thức là một tổng của những đơn thức. Mỗi đơn thức trong tổng gọi là một hạng tử của đa thức đó.

đùa à

man

12 cái

cổ tích

cổ truyền

Đa thức một biến là tổng của những đơn thức của cùng một biến. 

HT!

cái bóng nha

HT moon<3