What is the perimeter of a rectangle with length 8 and width 5?

To find the perimeter of a rectangle, the formula used is ( P = 2 \times (length + width) ). In this case, the length is 8 and the width is 5.

First, calculate the sum of the length and width:

[ 8 + 5 = 13 ]

Next, multiply this sum by 2 to find the perimeter:

[ P = 2 \times 13 = 26 ]

Thus, the perimeter of the rectangle, calculated correctly, is 26. This makes the first choice the correct answer. Understanding this formula is essential in tackling similar problems involving rectangles and gives a clear method for perimeter calculation.