Area of triangle = \( \frac{1}{2} \times \text{base} \times \text{height} \)

• Base KL = KM + LM = 10 + 34 = 44 cm
• Height JM = 21 cm (perpendicular to KL)
• Area = \( \frac{1}{2} \times 44 \times 21 = 462 \) cm²

Final Answer: 462