The perimeter of a square is 36ft. If you increase the length by 3ft and decrease the width by 5ft, what is the area of the new figure?

9 square feet

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We can first get the side length for the square because a square has 4 sides of equal length.

4 x side length = 36 ft

side length = 9 ft

If you increase the length by 3 ft and decrease the width by 5 ft, we will get a 12 ft by 4 ft rectangle as a result.

length = 9 + 3 = 12 ft

width = 9 - 5 = 4 ft

The area of the rectangle is ...

12 x 4 = 48 ft²

answer: 48 ft²