A rectangle has length 7 cm and perimeter 28 cm. What is its width?

Study for the Texas Education Agency Test. Engage with flashcards and multiple choice questions, complete with hints and explanations. Prepare for your exam!

Multiple Choice

A rectangle has length 7 cm and perimeter 28 cm. What is its width?

Perimeter of a rectangle is twice the sum of its length and its width. With a length of 7 cm and a total perimeter of 28 cm, set up the equation 28 = 2(7 + width). Divide both sides by 2 to get 14 = 7 + width, then subtract 7 to find width = 7 cm. Quick check: 2(7 + 7) = 28, which matches. The other options would produce perimeters that don’t equal 28, so they’re not correct. The width is 7 cm.

Perimeter of a rectangle is twice the sum of its length and its width. With a length of 7 cm and a total perimeter of 28 cm, set up the equation 28 = 2(7 + width). Divide both sides by 2 to get 14 = 7 + width, then subtract 7 to find width = 7 cm. Quick check: 2(7 + 7) = 28, which matches. The other options would produce perimeters that don’t equal 28, so they’re not correct. The width is 7 cm.

More practice questions