You have a shape made of 21 unit cells: a full rectangle of 6×3 (rows y=1..3), with a shorter top row of 3 cells centered (row y=0, columns x=2..4).
Goal: Cut along the grid lines so that the shape is divided into 3 identical parts. Each part must have the same shape (congruent) and 7 cells.
Click an edge between two cells to add or remove a cut.
Click an edge between two cells to add or remove a cut.
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