Explain how this figure is a trapezium. Which of its two sides are parallel ?

Since ∠KLM + ∠NML = 180° i.e., the pair of consecutive interior angles are supplmentary.

Therefore, KL || NM and so KLMN is a trapezium.

Explain how this figure is a trapezium. Which of its two sides are parallel ?

Therefore, KL || NM and so KLMN is a trapezium.