## {3,9}, triangle 1F + diamond 1A2, solution 3
h2.
angleunit(2*pi/9)
# the line below lets us specify internal angles
angleofs(pi)
distunit(edge(3,9))
unittile(1,1,1)
unittile(1,2,1,2)
unittile(1,1,1)
# the Conway notation
conway("(0 0'')(1 0')(1' 2'')(2 2')(3' 1'')")
sublines(1)