Question

an octagon has side lengths equal to 16.35 in. Find the area.

Answer 1

Area of a polygon of n sides and side length b is
\[ \frac { n b^2}4 \cot (\pi/n)=\frac{1}{4} \left(8(
16.35^2)\right) \cot
\left(\frac{\pi
}{8.}\right)= 1290.75
\]

Answer 2

See http://openstudy.com/study#/updates/4fa1fff9e4b029e9dc3306d6