Từ M kẻ hai đường thẳng song song 
với a và b bằng thước và compa

G = (19.108156525258156, -4.032679031037961)
J = (19.81352745320999, 2.2342703673033197)
M_1 = (11.728891432838983, 2.1800110651531788)
A_1 = (9.35036093313008, -0.4703092116896157)
B_1 = (24.71560876928362, 6.632726706147009)
a = Line(A_1, B_1)
C = (9.019132556822635, -3.951290077812753)
D = (32.62192899213395, -3.679993567062045)
b = Line(C, D)
M = (16.91558745200928, -0.22219622094851638)
B = Point(b)
B' = Point(b)
c = Segment(M, B)
d = Segment(B, B')
e = Circle(M, d)
f = Circle(B', c)
H = Intersect(e, f, 1.0)
g = Line(M, H)
A = Point(a)
A' = Point(a)
h = Segment(A, M)
i = Segment(A, A')
k = Circle(M, i)
p = Circle(A', h)
L = Intersect(k, p, 2.0)
j = Line(M, L)
l = Segment(A', L)
m = Segment(H, B')