$\"\"$

Each dimension of rectangle $\"\"$ is doubled,What is the perimeter of the new rectangle $\"\"$ .

Observe the figure,

The dimensions are $\"\"$ and $\"\"$

Find the perimeter of new rectangle $\"\"$ .

General form of the perimeter of the rectangle is $\"\"$ .

$\"\"$ (Substitute $\"\"$ and $\"\"$ )

$\"\"$ (Add inside terms)

$\"\"$ .

The dimensions of rectangle $\"\"$ is doubled, then the perimeter of the rectangle is also doubled.

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

$\"\"$ (Substitute $\"\"$ and $\"\"$ )

$\"\"$ (Multiply)

$\"\"$ (Add inside terms)

$\"\"$ .

The perimeter of the new rectangle $\"\"$ is $\"\"$ .

$\"\"$

The perimeter of the new rectangle $\"\"$ is $\"\"$ .