Author: IREM de Paris-Nord

A_0 = (3.061616997868383E-16, 5)
A_1 = (-2.499999999999999, 4.330127018922194)
A_2 = (-4.330127018922193, 2.5000000000000018)
A_3 = (-5, 6.123233995736766E-16)
A_4 = (-4.3301270189221945, -2.4999999999999987)
A_5 = (-2.4999999999999982, -4.3301270189221945)
A_6 = (-9.184850993605148E-16, -5)
A_7 = (2.5000000000000004, -4.330127018922193)
A_8 = (4.330127018922192, -2.500000000000002)
A_9 = (5, -1.2246467991473533E-15)
A_10 = (4.330127018922193, 2.5)
A_11 = (2.5000000000000027, 4.330127018922192)
a = Segment(A_1, A_0)
b = Segment(A_0, A_11)
c = Segment(A_11, A_10)
d = Segment(A_10, A_9)
e = Segment(A_9, A_8)
f = Segment(A_8, A_7)
g = Segment(A_7, A_6)
h = Segment(A_6, A_5)
i = Segment(A_5, A_4)
j = Segment(A_4, A_3)
k = Segment(A_3, A_2)
l = Segment(A_2, A_1)