Book: NCERT - Mathematics
Chapter: 3. Understanding Quadrilaterals
Subject: Maths - Class 8th
Q. No. 1 of Exercises 3.3
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1
Given a parallelogram ABCD. Complete each statement along with the definition property used.
(i) 
(ii) 
(iii) 
(iv) 
(i) In a parallelogram, opposite sides are equal in length
AD = BC
(ii) In a parallelogram, opposite angles are equal in measure
∠DCB = ∠DAB
(iii) In a parallelogram, diagonals bisect each other
Hence, OC = OA
(iv) In a parallelogram, adjacent angles are supplementary to each other
Hence,
m ∠DAB + m ∠CDA = 180°
5
in Fig 3.33 if 
and 
if 
in Fig 3.34.
is there more than one method to find 
?)