MATLAB: How can i draw a circle and how to draw arrow line


I wanna draw a circle that picture (with — line ). I used so many codes but i couldn't. Xm, Ym centre of circle and t is grad angle. I wrote some codes and user will some parameters and X,Y,Xm,Ym,t…. will found. I draw some line but i need other lines and text on grap. Is there someone who can help?
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