a - x

x

A = (0.1, 0.54)
B = (8.72, 0.5)
C = (1.86, 5.62)
mnogokotnik1, c, a, b = Polygon(A, B, C)
d = OrthogonalLine(A, a)
D = Intersect(d, a)
v = Segment(A, D)
γ = Angle(A, C, B)