great new features

[Wes Loewer]

Quote:10. Add triangle surface calculation in triangle solver

I remember when someone asked for this feature, some criticized the request as being a waste of programming effort, but I think it rounds out the Triangle Solver App nicely. I was using the Triangle Solver just today to check a student's work.

I wasn't sure what "surface calculation" meant at first, but then I figured it must be area. The word "surface" is usually used for a 3d solid. Perhaps the word "Area" could be placed above the S=value.

If the entered values for the sides are impossible (a=1, b=2, c=4), the area calculation displays:
S=NaN

I doubt that any of my students would know the meaning of NaN. Perhaps it would be better to display "no solution".

Or perhaps the words "Area" and "no solution" were intentionally not used so as to avoid the need for translations. If so, then leaving it blank would be better than NaN.