Draw a circle with center A with radius 5cm. Draw any one of the diameters. With same center A, draw another circle with radius 3cm. Draw any one of the diameters for this circle too. If you join the ends of both the diameters, the figure you will get is:
Parallelogram
Draw the circles and the diameters. You will get:
If you mark the diameter of smaller circle as AB and larger circle as CD, after joining them you will get:
Fig. ABCD is a parallelogram. When AB is perpendicular to CD, ABCD becomes a rhombus.