| Construction Algorithm |
| 1 |
 |
Construct
a point M as a center of the parallelogram. |
| 2 |
 |
Construct
two concentric circles with two different radii (MA and MB) centered at
M. |
| 3 |
|
Construct
a straight line passes through M and A. |
| 4 |
|
Generate
the intersection point between the line MA and the circle whose radius
MA at C. |
| 5 |
|
Construct
another line through M and B and generate its intersection point with
the circle whose radius MB at D. |
| 6 |
 |
Join up the
four points A, B, C, and D to get the required parallelogram. |
| 7 |
 |
Switch to
Move Mode. Pick a free element. Move it around to check your
construction. |
| Construction Theorem |
| A parallelogram is a
quadrilateral, in which diagonals bisect each other. |