A = (0, 0)
B = (12, 0)
C = (6, 10.392304845413264)
poly1, c, a, b = Polygon(A, B, C)
d = 1.2 (slider from 0 to 6, step 0.1)
M: (d, 0)
I = (6, 0)
N: (12 - d, 0)
e = OrthogonalLine(M, c)
f = OrthogonalLine(N, c)
P = Intersect(e, b)
Q = Intersect(f, a)
poly2, m, p, q, n = Polygon(M, P, Q, N)