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

Answer
Success!
r = 1.1283791670955
C = 2.2568π or 7.0898
d = 2.256758334191

↓Steps Explained:↓

A circle has area = 4

Calculate Area, Circumference, Radius, Diameter

Calculate radius (r):

A = πr2

Rearranging the equation, we get:

r2  =  A
  π

r  =  A
  π

r  =  4
  3.1415926535898

r  =  2
  1.7724538509055

r = 1.1283791670955

Calculate circumference (C):

C = 2πr

C = 2π * 1.1283791670955

C = 2.2568π or 7.0898

Calculate diameter (d):

d = 2r

d = 2 * 1.1283791670955

d = 2.256758334191

Final Answers

r = 1.1283791670955
C = 2.2568π or 7.0898
d = 2.256758334191
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