A

B

C

A'

A_0

C_0

B_0

A = (21.399041354394686, -1.825322772508253)
B = (21.3609368130883, -1.9532696932536886)
f = Line(A, B)
C = (21.558104272224657, -1.9482027191136195)
g = Line(B, C)
h = Line(C, A)
M = TriangleCenter(A, B, C, 13)
t1, c, a_1, b = Polygon(A, B, C)
D = (21.545535228256252, -2.013450984472848)
i = Line(M, D)
i' = Rotate(i, 60°, M)
F = Intersect(g, i')
G = Intersect(h, i')
H = Intersect(f, i)
I = Intersect(g, i)
J = Intersect(f, i')
α = Angle(I, M, G)
i'' = Rotate(i', 60°, M)
K = Intersect(h, i'')
j = Line(F, H)