Pentomino

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A pentomino is a polyomino of five squares.

The ancient pentomino puzzle uses free pentominoes.


The shapes

There are 12 free pentominoes. Six of them are chiral, making a total of 18 one-sided pentominoes.

Symmetric

..........
..IIIII...
..........

I

...TTT....
....T.....
....T.....

T

...G.G....
...GGG....
..........

U

...L......
...L......
...LLL....

V

...Z......
...ZZ.....
....ZZ....

W

....T.....
...TTT....
....T.....

X

Chiral

These come in mirrored pairs:

.J......L.
.JJJ..LLL.
..J....L..

R and F

..SS..ZZ..
..S....Z..
.SS....ZZ.

S and Z

J........L
JJJJ..LLLL
..........

J and L

.I......I.
IIII..IIII
..........

Y' and Y

..SS..ZZ..
SSS....ZZZ
..........

H and N

.OO....OO.
.OOO..OOO.
..........

P and Q

External links