Question

Mot hinh chu nhat co chieu dai la 2m va chieu rong la 4 phan 5 m tinh nua chi vi cua hinh chu nhat do

 

Answer 1

Nữa chu vi là:\(2+\frac{4}{5}=\frac{14}{5}\)(m)

Answer 2

Nửa chu vi HCN=14/5 m

Answer 3

Nửa chu vi=14/5