Answer:
I'm assuming that "why" is not part of this problem so this too is not answerable
Right angles are 90 degrees.
The A is 5 degrees so we subtract that off
85 degrees is the answer
Step-by-step explanation:
Area = PI * radius^2
radius^2 = Area / PI
radius^2 = 169*PI/PI
radius^2 = 169
radius = 13