The given rhombus ABCD can be drawn as follows:

Step 1: Draw a line segment AC = 6 cm.

Step 2: With A as centre draw an arc of 4cm (half of 8 cm) below AC.

Step 3: With C as centre draw another arc of 4cm such that it intersects the previous arc at B.

Step 4: Join AB and BC

Step 5: Repeat Step 3 and 4 on other side of AC to get D.

Step 6: Join AD and CD

ABCD is the required rhombus.