Teht. 327

A = (8, 6)
B = (13, 6)
c = Circle(A, B)
f = Line(A, B)
C = Point(c)
g = Line(C, A)
D, E = Intersect(c, f)
F, G = Intersect(c, g)
m1, e, f_1, d, g_1 = Polygon(E, F, D, G)
k1, c_1, b, e_1 = Polygon(B, E, C)
α = Angle(B, C, E)
β = Angle(E, G, B)