Question

A rectangular piece of cardboard measures 18 cm by 9 cm. What is the perimeter of the piece of cardboard?

Answer 1

Given:

Length, L = 18 cm

Width, W = 9 cm

Asked: What is the perimeter of the piece of cardboard?

Solution:

$\text{Perimeter of a rectangle = 2L + 2W}$$\begin{gathered} \text{Perimeter of a rectangle = 2(18) + 2}(9) \\ \text{Perimeter of a rectangle = 36 + }18 \\ \text{Perimeter of a rectangle = }54\text{ cm} \end{gathered}$

ANSWER: 54 cm