Question 1107831
Incomplete Description.  WHERE is the cut made?  WHICH PART is perimeter asked?


Maybe use a variable?

The original square is  {{{48/4=12}}}, twelve cm on each side.

Cut a width, x length, from one of the sides of the original square.


BOTTOM PART
Dimensions 12 and x
Perimeter 2*12=2x
or  {{{highlight_green(2x+24)}}}


UPPER PART
Dimensions 12 and 12-x
Perimeter  {{{2*12+2(12-x)}}}
{{{24+24-2x}}}
{{{highlight_green(48-2x)}}}