Problem:
A polygon with $9$ vertices has the coordinates $\left(
\begin{array}{cc}
 -0.484 & 0.035 \\
 -0.434 & 0.631 \\
 -0.347 & 0.88 \\
 0. & 0. \\
 0.214 & 0.946 \\
 0.255 & 0.122 \\
 0.337 & 0.442 \\
 0.406 & 0.733 \\
 0.416 & 0.917 \\
\end{array}
\right)$. Estimate the polygon's interior angles (in radians), area, and perimeter. Also, classify the polygon as 'Simple' or 'Convex'.
Answer:
Perimeter: $3.21$ 
Area: $0.69$ 
Type: Convex 
Angles: $\{1.56,2.62,2.27,3.12,2.96,1.66,2.88,2.02,2.89\}$
{'source': 'AMPS', 'file': 'amps/mathematica/geometry/polygons/40767.txt'}