of a circle is
I want to calculate
Area
Circumference
Radius
Diameter
All
  

Answer
Success!
r = 10
C = 20π or 62.8319
A = 100π or 314.1593

↓Steps Explained:↓

A circle has diameter = 20

Calculate Area, Circumference, Radius, Diameter

Calculate radius (r):

d = 2r

Rearranging the equation, we get:

r  =  d
  2

r  =  20
  2

r = 10

Calculate circumference (C):

C = 2πr

C = 2π * 10

C = 20π or 62.8319

Calculate Area (A):

A = πr2

A = π * 102

A = 100π or 314.1593

Final Answers

r = 10
C = 20π or 62.8319
A = 100π or 314.1593

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Related Calculators:  Unit Circle  |  Circle Equation  |  Annulus