Posted by Skye on Sunday, March 6, 2011 at 7:27pm.
a=?
s=10.5cm
A= 19,887.5cm squared
Pentagon
A=asn/2
19,887.5cm=a*10.5*5/2
39775=52.5a
a=757.61cm?
am i correct?
regular nonagon
a=9.6cm
A=302.4cm squared
find perimeter thanks!

geometry regular polygon  JJ, Thursday, February 2, 2012 at 7:07pm
302.4cm^2