What is the perimeter of a rectangle whose length is 9 cm and width is 4 cm?
Answer
26 cm
The correct answer is 26 cm — Thus, the perimeter is cm.
Step-by-step solution
- Add the length and width: cm. Because a rectangle has two pairs of equal sides, the perimeter is twice this sum. Compute cm.
- Thus, the perimeter is cm.
Common mistake: Forgetting to multiply the sum of length and width by 2
Concept tested: Perimeter of rectangle
Published · How this solution was prepared and checked
← All Understanding Elementary Shapes questions