Little explorations with HP calculators (no Prime)

[pier4r]

The following should be a bit easier than the last one, still I'm not finished. I do not have the 50g at the moment that is busy computing the tournament simulations.



So, if I am not mistaken, I realized that the angle ABC is bisected in E, that CB and AB are equal, that I can apply the Heron's formula, but then it was too late and I started to do rubbish. I am not sure if I can check the problem again until Monday though. Also, the little math handbook that I use to refresh known relationships is not helping, not even the Heron's formula is there.