Asymptote: CSE5
The Asymptote CSE5 package is a useful package that is supported on the AoPS forum. It is much larger than most other packages, and contains doubles of each function; a function with a full name and a function with an abbreviated name.
Function List
Mark Angle ( MA )
function MA ( pair A, real t1, real t2, label L, color C )
This function marks an angle around point , starting at angle degrees ( is the horizontal Ox axis, if the coordinate system would be centered in ), up to angle , with label ("$\frac{\pi}{3}$" for example is a good value for this parameter), and color (options are: (gray), (light blue)).