Given problem;
A =
r²
Solve for π;
To solve for π implies that we make it the subject of the expression.
So;
A = π r²
Now multiply both sides by 
So;
A x
=
x r² x
r² cancels out from the right side and leaves only π;
π = 
So 
Answer:
SAS
Step-by-step explanation:
well there exactly ths same you just add what ever inside and subtract forn 180 which is an angle