# 30-gon

At a regular 30-gon the radius of the inscribed circle is 15cm. Find the "a" side size, circle radius "R", circumference, and content area.

Correct result:

a =  3.1531 cm
R =  15.0826 cm
o =  94.5938 cm
S =  709.4536 cm2

#### Solution:

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