Answer:
21.8
Explanation:
basically what you're looking at is a right angle (the square) which is 90 degrees and part of it is 68.2 and the other is x.
This can be written as the equation 68.2 + x = 90.
Subtract 68.2 from both sides to get x = 21.8;
and there you go! That's your answer! Hope that helped a little bit :)