Editing Tetromino (section)

===Filling a modified rectangle with one set of tetrominoes===
All three sets of tetrominoes can fit rectangles with holes: 
<ul>
<li>All 5 free tetrominoes fit a 7×3 rectangle with a hole.</li>
<li>All 7 one-sided tetrominoes fit a 6×5 rectangle with two holes of the same "checkerboard color".</li>
<li>All 19 fixed tetrominoes fit a 11×7 rectangle with a hole.</li>
</ul>

{{multiple image 
| align = left
| image_style = border:none;
| image_gap = 25
| image1 = Tetromino Tiling - 7x3.svg
| width1 = 116
| caption1 = Free tetrominoes in a rectangle with one hole
| image2 = Tetromino Tiling - 6x5.svg
| width2 = 100
| caption2 = One-sided tetrominoes in a rectangle with two holes
| image3 = Tetromino Tiling 11x7.svg
| width3 = 175
| caption3 = Fixed tetrominoes in rectangle with one hole
}}
{{-}}