Answer
C = 36π or 113.0973
d = 36
A = 324π or 1017.876
↓Steps Explained:↓

A circle has radius = 18
Calculate Area, Circumference, Radius, Diameter
Calculate circumference (C):
C = 2πr
C = 2π * 18
C = 36π or 113.0973
Calculate diameter (d):
d = 2r
d = 2 * 18
d = 36
Calculate Area (A):
A = πr2
A = π * 182
A = 324π or 1017.876
Final Answers
C =
36π or
113.0973d =
36A =
324π or
1017.876Related Calculators:
Unit Circle |
Circle Equation |
Annulus