a_1 = 10 (slider from 0 to 10)
a_2 = 3 (slider from 0 to 10)
a_3 = 5.7 (slider from 0 to 10)
a_4 = 6.8 (slider from 0 to 10)
A_0 = Intersect(xAxis, yAxis)
B_{0}: (a_1, 0)
Angle = 0.08726646259971647 rad (slider from 0° to 360°, step 0.017453292519943295)
A: (a_2; Angle)
B_4 = Circle(B_{0}, a_4)
B_3 = Circle(A, a_3)
B = Intersect(B_4, B_3, 2)
B' = Intersect(B_4, B_3, 1)
f = Segment(A_0, A)
g = Segment(A, B)
h = Segment(B, B_{0})
i = Segment(A, B')
j = Segment(B', B_{0})
k = Line(A, xAxis)
θ_1_3 = Angle(k, g)
C = Point(xAxis)
θ_1_4 = Angle(C, B_{0}, B)
θ_1_4' = Angle(C, B_{0}, B')
θ_1_3' = Angle(k, i)
θ_1_2 = Angle(xAxis, f)