First you need to find how many centimeters the length of the rectangle is.
To do this, add another 12 cm to the specified value of the width.
9 + 12 = 21 cm.
In order to find out the perimeter of a rectangle, you need to multiply the sum of the width and length of the shape by 2.
2 * (9 + 21) = 2 * 30 = 60 cm.
The area of the rectangle will be equal to the product of the shape’s width by its length.
9 * 21 = 189 cm2
Answer: the perimeter of the rectangle is 60 cm, the area of the figure is 189 cm2 (square centimeters).
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