Problem:
A polygon with $9$ vertices has the coordinates $\left(
\begin{array}{cc}
 0.124 & 0.837 \\
 0.145 & 0.175 \\
 0.191 & 0.904 \\
 0.276 & 0.061 \\
 0.281 & 0.404 \\
 0.364 & 0.239 \\
 0.59 & 0.415 \\
 0.6 & 0.232 \\
 0.653 & 0.638 \\
\end{array}
\right)$. Estimate the polygon's interior angles (in radians), area, and perimeter. Also, classify the polygon as 'Simple' or 'Convex'.
Answer:
Angles: $\{2.01,3.03,4.89,1.,1.94,2.,3.47,1.82,1.84\}$ 
Type: Simple 
Perimeter: $2.46$ 
Area: $0.24$
{'source': 'AMPS', 'file': 'amps/mathematica/geometry/polygons/35360.txt'}