A = (-1.1311730123365091, 1.2564593937791502)
B = (-0.8008730729774263, -0.027206279639104054)
C = (0.8393663986125652, -0.012192646031873016)
Tên đa giác1, c, a, b = Polygon(A, B, C)
d = Line(B, C)
e = OrthogonalLine(A, d)
H = Intersect(e, d)
E = (-1.3901581920612447, -0.4926289214632664)
F = (-0.9059685082280435, -0.4963823298650742)
g = Segment(E, F)
h = Circle(H, g)
G, H_1 = Intersect(h, d)
I, J = Intersect(h, e)
α = Angle(H_1, H, J)
h_a = Segment(A, H)