Answer
Success!
r = 6.5
C = 13π or 40.8407
A = 42.25π or 132.7323
C = 13π or 40.8407
A = 42.25π or 132.7323
↓Steps Explained:↓
A circle has diameter = 13
Calculate Area, Circumference, Radius, Diameter
Calculate radius (r):
d = 2r
Rearranging the equation, we get:
| r = | d |
| 2 |
| r = | 13 |
| 2 |
r = 6.5
Calculate circumference (C):
C = 2πr
C = 2π * 6.5
C = 13π or 40.8407
Calculate Area (A):
A = πr2
A = π * 6.52
A = 42.25π or 132.7323
Final Answers
r = 6.5C = 13π or 40.8407
A = 42.25π or 132.7323
Take the Quiz
Related Calculators: Unit Circle | Circle Equation | Annulus