Find the

Find the content of a regular 12 sided polygon, if its side a = 12 cm.

Correct result:

S =  1612.2459 cm2

Solution:

a=12 cm n=12  A=360/n=360/12=30  tanA/2=a/2h  h=(a/2)/tan(A/2)=(12/2)/tan(30/2)22.3923 cm  S1=h a2=22.3923 122134.3538 m2 S=n S1=12 134.3538=1612.2459 cm2



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