## {3,13}, pentiamond 1, solution 2
h2.
angleunit(2*pi/13)
# the line below lets us specify internal angles
angleofs(pi)
distunit(edge(3,13))
unittile(1, 2, 3, 2, 1, 3, 3)
# the Conway notation
conway("(0 1)(2)[3 6](4 5)")
sublines(1)