# Circumcircle of a regular polygon Calculator

## Calculates the radius and area of the circumcircle of a regular polygon.

 number of sides n n＝3,4,5,6.... side length a 6digit10digit14digit18digit22digit26digit30digit34digit38digit42digit46digit50digit circumradius r diameter φ circumcircle area Sc polygon area Sp area ratio Sc/Sp
Circumcircle of a regular polygon
 [1-9] /9 Disp-Num5103050100200
[1]  2021/03/30 04:40   60 years old level or over / A retired person / Very /
Purpose of use
To calculate the radius of a wheel bolt pattern
Comment/Request
In circumradius formula #1, I believe Pi should be replaced with 180.
[2]  2020/10/17 11:24   20 years old level / An office worker / A public employee / Very /
Purpose of use
Finding correct sizing of a drill bit to convert a hand grinder to an electric grinder
[3]  2020/10/11 15:33   40 years old level / A homemaker / Very /
Purpose of use
Need to figure out size of circle to cover raw edges in a quilt pattern for multiple sizes of Dresden plates.
[4]  2020/07/21 19:26   60 years old level or over / A retired person / Very /
Purpose of use
Lay out raised flower bed
Comment/Request
I had an odd number of patio/wall blocks and wanted largest size (circular) bed they would make. It was easy to lay out once the diameter was known.
[5]  2019/11/15 17:59   20 years old level / An engineer / Very /
Purpose of use
[6]  2019/04/09 01:32   30 years old level / An engineer / Very /
Purpose of use
A quick check to determine if a cube has enough clearance to fit inside a cylindrical tube.
Comment/Request
I've used this a few times now, Thanks!
[7]  2018/06/12 22:39   Under 20 years old / Elementary school/ Junior high-school student / A little /
Purpose of use
Finding distance between points on circle
Comment/Request
Solve for a
[8]  2018/01/06 04:48   50 years old level / High-school/ University/ Grad student / Useful /
Purpose of use
calculate size of rectangular prism that will fit inside a cylinder as part of designing a home made propane blacksmiths forge
[9]  2015/08/03 14:23   20 years old level / An office worker / A public employee / Very /
Purpose of use
Designing satellite constellations for Kerbal Space Program

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