n°

l =  \frac{ πRn }{180 } 

B = (63.84668588820423, -14.691768493661634)
A = (29.31923400542256, -2.1363314453773934)
C = (52.3830259745534, -9.096410678665396)
c = Circle(A, C)
D = Point(c)
E = Point(c)
a = Segment(E, A)
R = Segment(A, D)
α = Angle(E, A, D)
l = CircleArc(A, E, D)