Answer:
21
Definitions:
Vertical: Two angles that share a common side.
Adjacent: Congruent meaning the same measure.
In this equation it is adjacent.
Explanation:
If you look at the red square in the corner, that means it is a right angle. If you didn't know right angles equal to 90 degrees. But before solving we need a formula.
Formula:
x + 69 = 90
We know that x plus 69 equals 90 degrees.
Step-By-Step:
Now to get our answer we subtract 90 degrees and 69 degrees:
90 - 69 = 21
Our official answer is 21.
Hope this helps!
~Hocus Pocus
