I had problems with precision in PASCAL.
My submissions:
Pyramids - AC
Sphere in a tetrahedron - WA
Triangle from centroid - WA
Family - WA
In all problems I used Extended, and on all my tests my solution gave the true answer.
If problem Pyramids to hand over Sphere is solved is necessary to attribute 4 more lines, but I receive WA.
How it is possible to receive greater precision?
Sorry for my bad English, i am from Russia.