Question

(a) Write a formula for the perimeter,P,of a rectangle width(W) and length (L).(b) Use your formula to calculate the perimeter of a rectangle with width 7cm and length 5cm.

Answer 1

Explanation

Part A

Since the rectangle has four sides comprising of two lengths and widths, the formula for the perimeter of a rectangle is given as;

Answer:

$P=2L+2W$

Part B

Using the formula to calculate the perimeter of a rectangle with width 7cm and length 5cm. We will have;

$\begin{gathered} P=2L+2W \\ P=2\times5+2\times7 \\ P=10+14 \\ P=24cm \end{gathered}$

Answer: 24cm