Question

find the missing side length. assume that all intersecting sides meet at right angles. include the correct unit in your answer.

Explanation:

Step1: Analyze horizontal side - lengths

The sum of horizontal side - lengths on the bottom should equal the sum of horizontal side - lengths on the top. The total horizontal length on the bottom is 13 ft. The known horizontal length on the top part of the figure (excluding the unknown side) is 8 ft.

Step2: Calculate the missing side

Let the missing side length be $x$. We have the equation $x + 8=13$. Solving for $x$, we get $x=13 - 8$.
$x = 5$ ft

Answer:

5 ft