Problem:
A polygon with $3$ vertices has the coordinates $\left(
\begin{array}{cc}
 0.523 & 0.705 \\
 0.672 & 0.759 \\
 0.811 & 0.495 \\
\end{array}
\right)$. Estimate the polygon's interior angles (in radians), area, and perimeter. Also, classify the polygon as 'Simple' or 'Convex'.
Answer:
Area: $0.02$ 
Angles: $\{0.98,0.45,1.71\}$ 
Type: Simple 
Perimeter: $0.81$
{'source': 'AMPS', 'file': 'amps/mathematica/geometry/polygons/47177.txt'}