Originally Posted by

**TKHunny** Too much rounding error, but I think you have it. That much rounding error is common for rounding everything to two decimal places.

I get B = 14.195521º

C = 15.804479º

and c = 19.990891

Of course, since we started with only three significant digits, there are good arguments for your value and many other things in between. Personally, I think significant firgure rules are a little out-dated. There is no need to add rounding error deliberately. Besides, it always has bothered my that 1/4 is easier to judge than 3/10, but since 1/4 = 0.25 and creates another decimal place, it cannot be acceptable.

Anyway, keep up the good work.