Problem:
A angle-side-angle triangle has angle $21 {}^{\circ}$, a side of length $13.5$ and an angle of measure $144 {}^{\circ}$. Determine the area, circumradius, inradius, and semiperimeter of the triangle.
Answer:
Area: $74.16$ 
Semiperimeter: $31.43$ 
Circumradius: $26.08$ 
Inradius: $2.36$
{'source': 'AMPS', 'file': 'amps/mathematica/geometry/triangles/91655.txt'}