Ұзындығы енінен 4 см артық, ал ауданы 60 см^2 - ге тен болатын тік төртбұрыштың периметрін тап.​

-our organise wants to   protect the environment.

-we fight against water and air    pollute

-are you unhappy with the ecological situate  in your region?  

-send us some inform about it and we`ll try to help. 

10.00   - it's ten o'clock10.40   -  it's twenty to eleven 10.10   -  it's ten past ten 11.20   -  it's twenty past eleven 10.20   -  it's twenty past ten 10.45   -  it's quarter to eleven 10.25   -  it's twenty-five past ten   9.45   -  it's quarter to ten   9.35   -  it's twenty-five to ten 10.50   -  it's ten to eleven 10.30   -  it's half past ten 11.10   -  it's ten past eleven