Creating a Rhombus
Begin by drawing a circle (center A and point B)
Create a point C on the circle
Draw a 2nd circle centered at B out to point A
Draw a 3rd circle centered at C out to point A
Create a point D at the intersection of these two circles
ABCD are the vertices of the rhombus
Finish by hiding the circles and drawing the line segments
Manipulate your rhombus and observe the behavior