Answer:
12.41
Step-by-step
A
=
π
×
r
2
If you know the area, then you can find the radius:
Divide the area by
π
, then find the square root.
r
=
√
A
π
→
r
=
√
121
π
π
=
√
121
=
11
units
Once you know the radius, you can find the circumference:
C
=
2
×
π
×
r
=
2
×
3.14
×
11
C
=
69.08
≈
69.1
units
