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Tangram becomes axisymmetric through translation and rotation.
As shown in the figure,

The positions of 1, 2, 4 and 6 in the left and right diagrams remain unchanged.

5 Rotate 90 counterclockwise around the right vertex, and then translate 5 squares upward.

Rotate 90 clockwise around the straight vertex, then translate 4 squares up and 2 squares to the right.

7 Rotate 180 clockwise or counterclockwise around the right vertex, and then translate it up by 2 squares to reach the position in Figure 7 on the right.