Answer:
Circumference:

Area:

Explanation:
Circumference formula: C = 2πr, where;
C = Circumference
π = (pi) 3.1416
r = radius
Replace the variables in the formula:

C =

Area formula: A = π
, where;
A = Area
π = (pi) 3.1416
r = radius
Replace the variables in the formula.

