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Geometry and Trigonometry Difficulty: Easy

What is the perimeter, in inches, of a rectangle with a length of $4$ inches and a width of $9$ inches?

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Explanation

Choice D is correct. The perimeter of a figure is equal to the sum of the measurements of the sides of the figure. It’s given that the rectangle has a length of $4$ inches and a width of $9$ inches. Since a rectangle has $4$ sides, of which opposite sides are parallel and equal, it follows that the rectangle has two sides with a length of $4$ inches and two sides with a width of $9$ inches. Therefore, the perimeter of this rectangle is $4 + 4 + 9 + 9$ , or $26$ inches.

Choice A is incorrect. This is the sum, in inches, of the length and the width of the rectangle.

Choice B is incorrect. This is the sum, in inches, of the two lengths and the width of the rectangle.

Choice C is incorrect. This is the sum, in inches, of the length and the two widths of the rectangle.