The figure has four rectangles and a square LKMN. Given that JN = 2 × LM.

• LM is a side of square LKMN. All sides of the square are equal.
• JN = 2 × LM (given).
• From the figure, LM = 6 cm, so JN = 2 × 6 = 12 cm.

Final Answer: JN = 12 cm