r = 5.5 (slider from 0 to 10, step 0.5)
B: (r, 0)
A = Intersect(xAxis, yAxis)
c = Circle(A, B)
distanceAB = Distance(A, B)
α = 2.0943951023931953 rad (slider from 0° to 360°, step 0.017453292519943295)
B' = Rotate(B, α, A)
α_1 = Angle(B, A, B')
f = Segment(B', A)
g = Segment(A, B)
d = CircleArc(A, B, B')