Find the Area $36 \pi \mathrm { m }$ A) $81 \pi \mathrm { m }$

Multiple Choice

Find the area. Leave your answer in terms of pi.
-A circle with circumference $36 \pi \mathrm { m }$

A) $81 \pi \mathrm { m }$
B) $1296 \pi \mathrm { m }$
C) $144 \pi \mathrm { m }$
D) $324 \pi \mathrm { m }$