O_1 = Point(xAxis)
O_2 = Mirror(O_1, yAxis)
A = Point(yAxis)
B = Point(yAxis)
f = Segment(O_1, O_2)
g = Segment(O_1, A)
h = Segment(A, O_2)
i = Segment(O_1, B)
j = Segment(B, O_2)
α = Angle(O_1, A, O_2)
β = Angle(O_1, B, O_2)