What is the formula for calculating the perimeter of a rectangle with length 8 cm and width 5 cm?

To calculate the perimeter of a rectangle, use the formula P = 2(length + width). For your rectangle, with a length of 8 cm and a width of 5 cm, it’s P = 2(8 cm + 5 cm) = 2(13 cm) = 26 cm. So, the perimeter is 26 cm—perfect for bragging about your math skills! Did you know that the concept of a rectangle dates back to ancient civilizations? The Egyptians utilized rectangular shapes in their pyramids and monuments, and their understanding of geometry helped them build the awe-inspiring structures we marvel at today. Rectangles have truly stood the test of time, both in mathematics and design!