Answer:
3
Step-by-step explanation:
2+1 = 3
The standard equation of a circle is:

where (h,k) is the center and r is the radius.
We need to make an equation of a circle, whose center is (11,-5) with any radius. Therefore, substitute the value.

The bolded part is your answer. Since the radius is not given, we can put any value.
(x,y)
x=input
y=output
example
we see
g=(1,2)
theefor
g(1)=2
a.
f(4)=1
g(1)=2
g(f(4))=2
b.
g(-2)=4
f(4)=1
f(g(-2))=1
c.
f(3)=5
g(5)=5
f(5)=0
f(g(f(3)))=0
The angles that make a square are 4 right angles. So 360°.
<BAC is half of the square but it's not 180°.
It's 90 because you are measuring BAC not CBA or vice versa.
Conclusion, <BAC = 90°.