Regular polygons inscribed to a circle Calculator

Calculates the side length and area of the regular polygon inscribed to a circle.

Regular polygons inscribed to a circle
number of sides n
    1. n=3,4,5,6....
circumradius r

side length a
    1.  
polygon area Sp
    1.  
circle area Sc
    1.  
area ratio Sp/Sc
    1.  

Regular polygons inscribed to a circle
[1-10] /57Disp-Num
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[1]  2019/03/12 10:49   Female / Under 20 years old / High-school/ University/ Grad student / Useful /
Purpose of use
Homework
[2]  2018/12/10 02:31   Male / 30 years old level / Others / Very /
Purpose of use
Drawing a 5-point star without a compass.
Comment/Request
Very useful! Thanks!
[3]  2018/10/09 20:34   Male / 40 years old level / High-school/ University/ Grad student / Very /
Purpose of use
Kettle BBQ Pizza oven top design
[4]  2018/10/09 03:50   Male / 60 years old level or over / An engineer / Useful /
Purpose of use
Fit a gear box cover
[5]  2018/09/04 09:28   Male / 60 years old level or over / A teacher / A researcher / A little /
Purpose of use
I plan to inscribe a five-pointed star inside a 48 inch diameter circle. I want to determine the dimensions of the interior pentagon.
[6]  2018/07/13 08:08   Male / 50 years old level / An office worker / A public employee / Very /
Purpose of use
On a delta style 3D printer, to calculate the largest square objects that could be printed on a printer with a 125mm radius circular build area.
[7]  2018/07/11 01:57   Female / 40 years old level / An office worker / A public employee / Very /
Purpose of use
Fitting a square peg to a round hole
[8]  2018/07/06 03:03   Female / Under 20 years old / Elementary school/ Junior high-school student / Useful /
Purpose of use
Math Hmwk
[9]  2018/06/03 01:16   Male / 50 years old level / Others / Useful /
Purpose of use
...to calculate the required diameter of a tube/pipe used to house four equally sized (dia) tubes/hoses.
[10]  2018/04/05 21:31   Male / 60 years old level or over / A retired people / Very /
Purpose of use
Making wooden planter for garden to fit in top of large pot. Like an old wooden bucket, but wide and shallow.
Comment/Request
Very useful. Thank you.

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