A = (48.92414573869055, 17.094974951580433)
B = (36.63325874940528, 1.5751261261269907)
C = (58.55895121757943, 1.5751261261269907)
đa giác1, c, a, b = Polygon(A, B, C)
d_1 = OrthogonalLine(A, a)
H = Intersect(d_1, a)
e = Segment(A, H)
E = (27.102613329747633, 10.116250983087943)
d = Line(E, a)
B' = Intersect(d, c)
H' = Intersect(d, e)
C' = Intersect(d, b)
α = Angle(C, H, A)