A = (0.37476998105122916, 3.2518027926502295)
B = (-1.3343168028398662, 0.39267630371092715)
C = (4.224208438226491, 0.39267630371092715)
đa giác1, c, a, b = Polygon(A, B, C)
g = Line(B, C)
i = OrthogonalLine(A, g)
H = Intersect(i, g)
h_a = Segment(A, H)
D = (-3.410777381399132, -2.466450185228375)
E = (-2.6121386973378744, -2.4345046378659245)
d = Segment(D, E)
e = Circle(H, d)
F = Intersect(e, h_a, 1.0)
H_1 = Intersect(e, g, 2.0)
α = Angle(H_1, H, F)
f = Segment(H, B)