Which of the following is not a necessary condition for a quadrilateral ABCD to be a parallelogram: ?

otium9ag

otium9ag

Answered question

2023-02-06

Which of the following is not a necessary condition for a quadrilateral ABCD to be a parallelogram:
A)AB = CD
B)AB // CD
C) A = 50 , C = 50 , B = 130
D)AB⊥AD

Answer & Explanation

Peso6gn

Peso6gn

Beginner2023-02-07Added 7 answers

The correct answer is D: AB⊥AD
Option (A): A parallelogram is defined as having opposite sides that are parallel.
Option (B): When opposite angles are equal and the sum of adjacent angles is 180∘, then also we can say that it is a parallelogram.
Option (C): When one side of a quadrilateral is perpendicular to the other, we cannot call it a parallelogram.
Option (D): When opposite sides are parallel then we can say that it is a parallelogram.

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