Problem:
A polygon with $9$ vertices has the coordinates $\left(
\begin{array}{cc}
 -0.911 & 0.58 \\
 -0.88 & 0.656 \\
 -0.436 & 0.779 \\
 -0.348 & 0.093 \\
 -0.322 & 0.806 \\
 -0.198 & 0.809 \\
 -0.14 & 0.013 \\
 -0.043 & 0.591 \\
 0. & 0. \\
\end{array}
\right)$. Estimate the polygon's interior angles (in radians), area, and perimeter. Also, classify the polygon as 'Simple' or 'Convex'.
Answer:
Perimeter: $2.75$ 
Area: $0.45$ 
Angles: $\{1.9,2.8,2.86,1.41,2.6,2.16,2.94,3.1,2.22\}$ 
Type: Convex
{'source': 'AMPS', 'file': 'amps/mathematica/geometry/polygons/22579.txt'}