На рисунке ABCD — параллелограмм. Выразите: а) АС через АВ и AD; б) DB через АВ и AD

1. I love my classmates because they are very helpful.
2. Our classroom is beautifully decorated.
3. There are 25 students in my group.
4. Our Math teacher is very strict.
5. There is a world map in my classroom.
6. Our teachers are very professional.

Hello!Today I want to tell about my class.I think that is very interesting topic.My class is very cool.I friend with all my classsmets.I love learn with them.