a)

b)

c)

d)

A = (-3.6221183694354435, 2.6606174313491344)
B = (0.9700017056114636, 2.6408238103360033)
a = Segment(A, B)
B' = Rotate(B, 280.0*°, A)
α = Angle(B', A, B)
A' = Rotate(A, 80.0*°, B)
β = Angle(A, B, A')
b = Ray(A, B')
c = Ray(B, A')
C = Point(b)
d = Line(C, a)
D = Intersect(d, c)
đa giác1, a_1, b_1, d_1, c_1 = Polygon(A, B, D, C)
γ = Angle(D, C, A)
G = (1.8805082722155921, -0.1896639945420424)
H = (6.7695326624594925, 0.20620842572061915)
e = Segment(G, H)
F' = Rotate(H, 80.0*°, G)
δ = Angle(H, G, F')
E'_1 = Rotate(G, 280.0*°, H)
ε = Angle(E'_1, H, G)
f = Ray(G, F')
g = Ray(H, E'_1)
F = Point(f)
E' = Rotate(G, 110.0*°, F)
ζ = Angle(G, F, E')
h = Ray(F, E')
E = Intersect(g, h)
đa giác2, e_1, f_1, h_1, g_1 = Polygon(G, H, E, F)
K = (7.7988009551424184, 2.4230939791915374)
M = (9.065592699982945, -0.011521405423846054)
i = Segment(K, M)
J' = Rotate(M, 110.0*°, K)
η = Angle(M, K, J')
j = Ray(K, J')
I' = Rotate(K, 290.0*°, M)
θ = Angle(I', M, K)
k = Ray(M, I')
I = Point(j)
L = Point(j)
p = Circle(I, K)
M_1 = Intersect(p, j, 2.0)
M' = Rotate(M_1, 290.0*°, I)
ι = Angle(M', I, M_1)
l = Ray(I, M')
N = Intersect(k, l)
đa giác3, i_1, j_1, n, k_1 = Polygon(K, M, N, I)
P = (13.49936380692478, 1.9750383762578867)
Q = (18.309213713116147, 2.660617431349137)
m = Segment(P, Q)
q = OrthogonalLine(P, m)
r = OrthogonalLine(Q, m)
T = Point(q)
s = OrthogonalLine(T, q)
S = Intersect(r, s)
đa giác4, o, p_1, r_1, q_1 = Polygon(P, Q, S, T)
κ = Angle(P, Q, S)
λ = Angle(Q, S, T)
μ = Angle(S, T, P)
ν = Angle(T, P, Q)