Answer:
110 degrees
Explanation:
A full rotation is 360 degrees, meaning if I turned completely around so that I am facing the exact same place as where I started, I will have turned 360 degrees.
So, If I were to turn 180 degrees, I would have turned half the amount of 360 degrees, and I would be facing the opposite direction in relation to where I started.
360 degrees is represented by a circle with two intersecting lines in the middle, and it looks like the file I attached
180 degrees, being half of 360, is represented by half a circle.
The picture in your question is also half a circle, just without the outer lines.
That means the entire angle is 180.
Knowing this, we can subtract 70 from 180 to get the degree measure for x.
180 - 70 = 110
Hope this helps, I don't know if I explained it very well.