Polyominoes are figures created by attaching multiple squares edge-to-edge. They are sorted based upon the number of squares they have.

Henominoes

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There is a single henomino, consisting of one square by itself.

Dominoes

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There is a single domino, consisting of two squares attached edge to edge.

Trominoes

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There are two trominoes: the I tromino, consisting of three squares attached in a straight line, and the L tromino, consisting of a square with two other squares attached to the top and bottom.

Tetrominoes

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There are five tetrominoes - the square tetromino (consisting of four squares in a square shape), the line tetromino (consisting of four squares in a straight line), the T tetromino (consisting of a square with three squares attached directly to it) and the L tetromino (consisting of three squares in a line then an additional square on the bottom at a right angle).

The tetromino with the largest edge length is the line tetromino, with an edge length of . The tetromino with the smallest edge length is the square tetromino, with an edge length of .

Pentominoes

There are twelve pentominoes. These are named, by their approximate shape:

  • Line pentomino
  • L pentomino
  • P pentomino
  • R pentomino
  • S pentomino
  • T pentomino
  • U pentomino
  • V pentomino
  • W pentomino
  • X pentomino
  • Y pentomino
  • Z pentomino

The pentomino with the largest edge length is the line pentomino, with an edge length of . The pentomino with the smallest edge length is the P pentomino, with an edge length of .

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