Date: 8 3 月 2014

$A$

$B$

$C$

$E$

$P$

$Q$

$D$

A = (2.08, 2.64)
B = (-1.86, 1.24)
C: B + (7, 0)
a = Segment(A, B)
b = Segment(B, C)
c = Segment(C, A)
E = Rotate(A, 60*°, B)
P = (1.42, 1.68)
d = Segment(A, E)
e = Segment(E, B)
f = Segment(P, A)
Q = Rotate(A, 60*°, P)
g = Segment(Q, P)
h = Segment(Q, A)
Poly1, f_1, a_1, q = Polygon(A, Q, E)
Poly2, p, a_2, b_1 = Polygon(A, B, P)
i = Segment(E, Q)
j = Segment(B, P)
k = Segment(P, C)
l = Line(E, A)
D = Intersect(l, k)
α = Angle(B, A, C)