Capital-letter variable names correspond to angle measures, opposite from each side length named by the lowercase-letter counterpart.  All angle measure inputs are in degrees (pre-multiplied by 180:pi).  The side lengths a, b and c are in arbitrary units and do not at all affect the triangle size or drawing in any way, other than to help compute any unknown angle measures.

I also maintain a separate research project to derive many exact trigonometric ratios so that many of these answers can be expressed in exact form.

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