Circle radius = 20
Publish date: 2024-06-28
Circle radius = 20 
A circle has radius = 20
Calculate Area, Circumference, Radius, Diameter
Calculate circumference (C):
C = 2πr
C = 2π * 20
C = 40π or 125.6637
Calculate diameter (d):
d = 2r
d = 2 * 20
d = 40
Calculate Area (A):
A = πr2
A = π * 202
A = 400π or 1256.6371
Final Answers
C = 40π or 125.6637
d = 40
A = 400π or 1256.6371
You have 1 free calculations remaining
What is the Answer?
C = 40π or 125.6637
d = 40
A = 400π or 1256.6371
How does the Circles Calculator work?
Free Circles Calculator - Calculates and solves for Radius, Diameter, Circumference, and Area of a Circle.
This calculator has 1 input.
What 3 formulas are used for the Circles Calculator?
What 7 concepts are covered in the Circles Calculator?
areaNumber of square units covering the shapecirclethe set of all points in the plane that are a fixed distance from a fixed pointcirclescircumferencethe perimeter of a circle or ellipsdiameterdistance from two endpoints of a circle through the centerd = 2roriginOn a two digit coordinate plane, the point (0, 0), where the x-axis and y-axis cross.radiusDistance from the center of a circle to the edge
C/2π
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