102 INDEX
modulo, see mod
multiplication mo d n , 6 5
multiplication tabl e
of a triangle , 3 5
n-gon, 3 0
odd permutation , 9 0
order
of a rotation , 4 6
Penrose tiles , 5 3
pentagon
easy wa y t o mak e one , 3 1
regular, 2 9
permutation, 6 7
even o r odd , 9 0
phantom figure, 2 2
Pölya, George , 4 8
polygon
symmetries of , 3 3
presentation, 9 2
QuasiTiler, 5 3
fl, 19
r, smalles t rotatio n symmetry , 3 2
reflection, 19
regular polygon , 2 9
symmetries of , 3 0
regular solid , 9 5
relation, 9 2
rigid motio n
glide reflection , 2 2
reflection, 19
rotation, 16
measured counterclockwise , 2 8
translation, 15
rigid motio n o f th e plane , 15
rotation, 16
measured counterclockwise , 2 8
rotocenter, 16
rotocenter, 16
equivalent, 4 4
rules o f exponents , 3 2
silly walks , 4 2
SN, symmetri e group , 6 8
spokes o f a wheel , 17
square
symmetries of , 29 , 3 3
strip pattern , 3 9
subgroup, 6 1
symmetrie group , 68
symmetries
of a polygon , 3 3
of a square , 29 , 3 3
symmetry, 2 7
symmetry type , 36 , 7 1
CN, cyclic , 3 6
DN, dihedral , 3 7
Timbanidis, Nicolas , 3 4
translation, 15
transposition, 71, 90
triangle
multiplication table , 3 5
trivial symmetry , 2 7
wallpaper pattern , see wallpatter n
wallpattern, 4 3
fl, 19
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