B = (0, 0)
C = (6, 0)
A = (2, 4)
AB = Segment(A, B)
AC = Segment(C, A)
BC = Segment(B, C)
M: (A + 3.0 * B) / 4.0
L: (3.0 * A + B) / 4.0
C': (A + B) / 2.0
N: (3.0 * B + C) / 4.0
A': (B + C) / 2.0
P: (B + 3.0 * C) / 4.0
Q: (3.0 * C + A) / 4.0
B': (A + C) / 2.0
R: (3.0 * A + C) / 4.0
MCR, MC, CR, RM = Polygon(M, C, R)