## {4,4}, pentomino 5 (R), solution 18
e2.
angleunit(pi/2)
# the line below lets us specify internal angles
angleofs(pi)
unittile(1,1,2,1,3,1,1,3,1,1,2,3)
# the Conway notation
conway("[0 10](1 8)(2 7)(3 5)(4)(6)[9 11]")
sublines(1)