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To find the area of a rectangle, you multiply its length by its width. In this case, the length is 12 feet and the width is 3 feet. Multiplying 12 by 3 gives you 36 square feet. Therefore, the area of a rectangle with dimensions 3 feet by 12 feet is 36 square feet.

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If the given dimensions are in feet then 3 times 12 = 36 square feet

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Wiki User

7y ago
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Q: How many square feet is 3x12?
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