Answer:

Explanation:
We need to find the measure of "x":
Based on the figure, we know that:

Then, we need to solve for "x". Therefore, its measure in degrees is:

By definition, the sum of the interior angles of a triangle is 180 degrees. Since we know the measure of "x" and we know that one of the interior angles is a the right angle (an angle that measures 90 degrees), we can conclude that:

Substituting the value of "x" into the equation and solving for "z", we get:
