Regular polygon circumscribed to a circle Calculator

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

Regular polygon circumscribed to a circle
number of sides n
    1. n=3,4,5,6....
inradius r

side length a
    1.  
polygon area Sp
    1.  
circle area Sc
    1.  
area ratio Sp/Sc
    1.  
    Regular polygon circumscribed to a circle
    [1-10] /23Disp-Num
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    [1]  2021/05/06 21:39   30 years old level / High-school/ University/ Grad student / Very /
    Purpose of use
    To determine the open diameter of an expanding ring-like structure with 8 hinge units.
    [2]  2021/01/08 23:00   40 years old level / High-school/ University/ Grad student / Very /
    Purpose of use
    Determining lengths of sides of polygonal frame around a round gateway
    [3]  2020/04/19 04:16   60 years old level or over / A retired person / Very /
    Purpose of use
    Calculating rounded root for gear tooth space
    [4]  2019/08/10 13:45   50 years old level / An engineer / Very /
    Purpose of use
    determining the smallest size of turntable to support 36 tracks on an HO scale model railroad
    [5]  2019/04/05 12:52   60 years old level or over / A retired person / Very /
    Purpose of use
    Central play station game piece planning
    [6]  2019/02/19 20:14   20 years old level / High-school/ University/ Grad student / A little /
    Purpose of use
    Wished that you could enter a perimeter and it give you a radius
    [7]  2018/06/09 12:47   60 years old level or over / A retired people / Very /
    Purpose of use
    Used to create a Pentagon for a power tool workstation with the biggest possible sides. Thanx for the calculator and the effort.
    [8]  2018/03/20 15:04   60 years old level or over / An engineer / Useful /
    Purpose of use
    Building a wooden frame. Didn''t want to spend the time to derive calculations myself.
    [9]  2018/03/20 11:37   Under 20 years old / High-school/ University/ Grad student / - /
    Comment/Request
    area of regular polygon circumscribed about the circle
    [10]  2017/09/13 11:17   50 years old level / Others / Very /
    Purpose of use
    Cutting out a clock face

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