Incircle of a regular polygon Calculator

Calculates the radius and area of the incircle of a regular polygon.

Incircle of a regular polygon
number of sides n
    1. n=3,4,5,6....
side length a

inradius r
    1.  
diameter φ
    1.  
incircle area Sc
    1.  
polygon area Sp
    1.  
area ratio Sc/Sp
    1.  
    Incircle of a regular polygon
    [1-9] /9Disp-Num
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    [1]  2022/09/14 19:15   40 years old level / Others / Very /
    Purpose of use
    Optimal diameter of pipe section to tightly connect each vertex of 5 timber struts for geodesic dome. Cannot be bothered (today) trying to figure out from first principles. Thankyou!
    [2]  2020/06/22 07:29   Under 20 years old / High-school/ University/ Grad student / Very /
    Purpose of use
    make a lantern
    Comment/Request
    thank you very much
    [3]  2020/03/09 14:52   20 years old level / High-school/ University/ Grad student / Very /
    Purpose of use
    programming
    [4]  2018/09/25 00:13   60 years old level or over / A retired person / Very /
    Purpose of use
    Designing a skeletal SciFi space-tug with pentagonal symmetry to grapple and haul 10 kilotonne fuel tanks...
    [5]  2018/03/30 03:53   Under 20 years old / High-school/ University/ Grad student / Very /
    Purpose of use
    to study for TCSIT Geometry
    [6]  2018/03/06 14:19   Under 20 years old / High-school/ University/ Grad student / Very /
    Purpose of use
    to learn a lot
    [7]  2017/05/07 10:09   30 years old level / Others / Very /
    Purpose of use
    Building base for above ground circular pool. Handy to calculate radius / diameter.
    [8]  2011/07/24 23:00   50 years old level / Others / Very /
    Purpose of use
    constructing colums/woodworking
    Comment/Request
    impressed, this function is one of the least common but very useful to me
    [9]  2010/05/22 03:06   50 level / A teacher / Very /
    Purpose of use
    to check my answers
    Comment/Request
    i am a civil engineer Msc holder and i teach maths to students and engineers and explain to them how to use and implement math problems in their practical works.

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