Question

the perimeter of the figure below is 69.6 ft. find the length of the missing side. (note: diagram is not to scale) answer attempt 1 out of 2 ? = ft

Explanation:

Step1: Sum up the known side - lengths

$8.3 + 6.9+6.9 + 6.9+6.9+10.1+2.3+2.3+8.3$
$=(8.3\times2)+(6.9\times4)+10.1+(2.3\times2)$
$ = 16.6+27.6 + 10.1+4.6$
$=58.9$

Step2: Subtract the sum of known sides from the perimeter

Let the missing side length be $x$.
We know that perimeter $P$ of the figure is the sum of all side - lengths. So $P=58.9 + x$.
Since $P = 69.6$, then $x=69.6−58.9$
$x = 10.7$

Answer:

$10.7$