Problem:
A polygon with $8$ vertices has the coordinates $\left(
\begin{array}{cc}
 -0.375 & 0.356 \\
 -0.327 & 0.245 \\
 -0.261 & 0.783 \\
 -0.258 & 0.181 \\
 0. & 0. \\
 0.311 & 0.835 \\
 0.506 & 0.508 \\
 0.553 & 0.661 \\
\end{array}
\right)$. Estimate the polygon's interior angles (in radians), area, and perimeter. Also, classify the polygon as 'Simple' or 'Convex'.
Answer:
Angles: $\{2.48,2.73,3.,1.74,2.66,1.9,2.42,1.92\}$ 
Type: Convex 
Area: $0.5$ 
Perimeter: $2.72$
{'source': 'AMPS', 'file': 'amps/mathematica/geometry/polygons/21763.txt'}