Question

Find the missing side length.

Assume that all intersecting sides meet at right angles.
Be sure to include the correct unit in your answer.

Answer 1

8 ft

Explanation:

You have a rectilinear plane figure and want to know one side length when all the others are given.

Sums

The sum of left-side vertical dimensions is equal to the sum of right-side vertical dimensions:

13 ft = ? ft + 5 ft

(13 -5) ft = ? ft . . . . . . . subtract 5 ft

8 ft = ? ft . . . . . . . . . . simplify