Select the correct answer. The perimeter of a rectangle is 42 inches. If the width of the rectangle is 6 inches, what is the length? A. 12 inches B. 15 inches C. 21 inches D. 40 inches
Answer: B. 15 A rectangle has 4 sides, so width has two sides and length has two sides. Multiply 6 by 2 and get 12, subtract 12 from 42, then you get 30. Half of 30 is 15.
