I need answer please help me!

Answer:
if r=1
c=6.2832
r=2.5 c=15.708
r=3 c=18.8496
r=5 c=31.416
r=6 c=37.6992
Answer:
Step-by-step explanation:
if r=1
c=6.2832
r=2.5 c=15.708
r=3 c=18.8496
r=5 c=31.416
r=6 c=37.6992