\"\"

\

Observe the figure:

\

The length of the rectangle is \"\".

\

The width of the rectangle is \"\".

\

Hence the perimeter of the rectangle is \"\".

\

\"\"       (Substitute \"\" and \"\")

\

\"\"     (Distributive property: \"\")

\

Therefore, the perimeter of the rectangle is \"\".

\

\"\"

\

The perimeter of the rectangle is \"\".