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musiclover10045

A rectangle would have two sides 12 meters long and two sides 9 meters wide.

The perimeter is the sum of the four sides.

12 + 12 + 9 + 9 = 42

The perimeter is 42 meters

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Answer:

42m

Step-by-step explanation:

The formula for perimeter of a rectangle is P=2(l+w)

P=2·(12+9)=42