| Construction Algorithm |
| 1 |
 |
Construct
a line AB as a given base of the square. |
| 2 |
 |
Construct two perpendicular lines to AB at A and B. |
| 3 |
|
Construct
a point C on the perpendicular line at B so that AB = BC. |
| 4 |
|
Construct
a point D on the perpendicular line at A so that AB = AD. |
| 5 |
 |
Join
up the four points A, B, C, and D to get the required square. |
| 6 |
 |
Switch
to
drag mode. Pick
a free element. Move it around to check your construction. |
| Construction Theorem |
| A square is a quadrilateral whose four right angles and four sides equal in length. |