A circle has diameter = 18
Calculate Area, Circumference, Radius, Diameter
Calculate radius (r):
d = 2r
Rearranging the equation, we get:
| r = | d |
| 2 |
| r = | 18 |
| 2 |
r = 9
Calculate circumference (C):
C = 2πr
C = 2π * 9
C = 18π or 56.5487
Calculate Area (A):
A = πr2
A = π * 92
A = 81π or 254.469
Final Answers
r = 9
C = 18π or 56.5487
A = 81π or 254.469
C = 18π or 56.5487
A = 81π or 254.469
