1.( 1+ 12)+(2+ 1 1)+(3+ 10)+(4+9)+(5+8)+(6+7)= 13*6=39*2=78

Because all sticks are required to be used and cannot be broken and bent, the circumference of the rectangle made of this 12 stick is 78 cm, and the sum of its length and width is 39 cm. 39= 13+ 13+ 13= 13+26。

So it is 26 cm long and 13 cm wide.

2。 78/4=39/2 is not an integer, so it cannot be spelled.