Problem:
A triangle has sides $15., 11., 19.5$. Determine the area, circumradius, inradius, and semiperimeter of the triangle.
Answer:
Area: $82.05$ 
Circumradius: $9.8$ 
Semiperimeter: $22.75$ 
Inradius: $3.61$
{'source': 'AMPS', 'file': 'amps/mathematica/geometry/triangles/6826.txt'}