The perimeter of a figure is the sum of all of its sides.
In the given figure we can observe two missing sides, so we need to find its lengths as follows:
So:
[tex]\begin{gathered} 3ft+y=4ft \\ y=4ft-3ft \\ y=1ft \\ And \\ x+2ft=5ft \\ x=5ft-2ft \\ x=3ft \end{gathered}[/tex]
Thus, the perimeter is:
[tex]\begin{gathered} P=3ft+5ft+4ft+2ft+y+x \\ P=3ft+5ft+4ft+2ft+1ft+3ft \\ P=18ft \end{gathered}[/tex]
The answer is A) 18 ft.
