Answer:
70 degrees
Step-by-step explanation:
Straight angles always equal 180 degrees
One angle is 20 degrees and the angle with the box is 90 degrees
90+20=110
180-110=70
70º
A straight line is 180º You should know that a right angle is 90º
Next you need to subtract 110 from 180
And you get 70
I hope that this is the right answer!
