The correct way to address people here is
"Dear chatters and ducks, respected marmots,
Do you recommend latex for drawing triangles inscripted in circles? (With angles and vectors)" ;-)
My answer would be: yes, I do recommend to use LaTeX for it since then the font in these figures matches the font of the text. Of course, you could use e.g. inkscape to draw these things, which would also allow you to use the same font.