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Question

There is a quadrilateral ABCD with AB=4 cm, BC= 3cm, AD= 2cm, CD= 2cm and angle B=90. Can such a quadrilateral exist? Explain. [2 MARKS]

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Solution


Concept : 1 Mark
Explination : 1 Mark

The above could be a rough sketch of our quadrilateral ABCD. Let us try to understand if

ABC=90 . By Pythagoras theorem, AC2 = AB2 + BC2

Hence diagonal AC = 5 cm.

Now in triangle ADC, sum of 2 sides has to be greater than 3rd side. But in this triangle AC is greater than AD + DC. Hence the quadrilateral cannot be constructed.


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