| Construction Algorithm | ||
| 1 |  |
Construct a line AC as a given diagonal of the square. |
| 2 | |
Construct M as a midpoint of the diagonal AC. |
| 3 | |
Construct the perpendicular line at M. |
| 4 |  |
The rotation button is already generated in the construction area. |
| 5 | |
Rotate the points A and C with the defined rotation to construct the points B and D. |
| 6 | |
Join up the four points A, B, C and D to get the required square. |
| 7 | |
Switch to drag mode. Pick a free element. Move it around to check your construction. |
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The two diagonals of the square are perpendicular to each other and equal in length. |
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