Lately, ApprenticeCoder (on cemetech and tifreakware) and I have been working on a triangle solver in lua for nspire, and I must say its coming out awesome!

It uses the law of sines and law of cosines to solve any right or nonright triangle, and even draws a picture of the triangle!
Also features two color themes

Screenie:


Download Below! ^^^

* Sorunome wanders what happens if you make a side ridiculously long

It automatically scales down the drawing so the largest side is always the same length

then what if you have like 0.00000000000000001° corners

Well, they can't all be  0.00000000000000001° because it has to add up to 180°. Also, you can only type in 10 digits But yes, if you made one angle 0.00000001°, it would look a lot like a line

It really looks very nice. What about adding some circle theorems (quizzes) on another tab (http://www.mathsisfun.com/geometry/circle-theorems.html)? Just saying...
Keep up the interesting work. Geometry geeks will surely love it.

Only just saw this. I remember writing a program like this once for the 84+ and boy was it useful. I'm probably not gonna use this because hey I don't need it for school, but I bet this is going to get quite some users when put on ticalc.