Book: NCERT - Mathematics
Chapter: 3. Understanding Quadrilaterals
Subject: Maths - Class 8th
Q. No. 10 of Exercises 3.3
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10
Explain how this figure is a trapezium. Which of its two sides are parallel? (Fig 3.32)
We know that if a transversal line intersects two given lines in such a way that the sum of the measures of the angles on the same side of transversal is 180o, then the given two lines are parallel to each other.
Hence,
∠NML + ∠MLK = 180°
Hence, NM||LK
As quadrilateral KLMN has a pair of parallel lines, therefore, it is a trapezium
10
in Fig 3.33 if 
and 
if 
in Fig 3.34.
is there more than one method to find 
?)