Circle circumference = 15

Circle circumference = 15

A circle has circumference = 15

Calculate Area, Circumference, Radius, Diameter

Calculate radius (r):

C = 2πr

Rearranging the equation, we get:

r  =	C
	2π

r  =	15
	2 * 3.1415926535898

r  =	15
	6.2831853071796

r = 2.3873241463784

Calculate diameter (d):

d = 2r

d = 2 * 2.3873241463784

d = 4.7746482927569

Calculate Area (A):

A = πr2

A = π * 2.38732414637842

A = 5.6993π or 17.9049

Final Answers

r = 2.3873241463784
d = 4.7746482927569
A = 5.6993π or 17.9049

You have 1 free calculations remaining

What is the Answer?

r = 2.3873241463784
d = 4.7746482927569
A = 5.6993π or 17.9049

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 center
d = 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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