Question what-i
What is the perimeter, in inches, of a rectangle with a length of inches and a width of inches?
What is the perimeter, in inches, of a rectangle with a length of 4 inches and
Medium-difficulty · SAT Math · Area and Volume — Area of polygons and composite shapes. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer 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 inches and a width of inches. Since a rectangle has sides, of which opposite sides are parallel and equal, it follows that the rectangle has two sides with a length of inches and two sides with a width of inches. Therefore, the perimeter of this rectangle is , or 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.
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