What is the difference between the lengths of diagonals of parallelogram ABCD (BD>AC)?
(1) AB−BC=2
(2) ∠ABC=30 degrees
OA is E
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What is the difference between the lengths of diagonals
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sachin_yadav
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sachin_yadav
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sachin_yadav wrote:What is the difference between the lengths of diagonals of parallelogram ABCD (BD>AC)?
(1) AB−BC=2
(2) ∠ABC=30 degrees
OA is E
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Hi sachin_yadav,
This DS question is a 'concept' question - you don't have to really do any 'math' to solve it, but you do need to understand the concepts involved. We know that we're dealing with a parallelogram and we're asked for the difference in the lengths of the two diagonals within that shape. To answer this question, we need to know the exact lengths of the sides AND the angles within this shape.
1) Tells us the difference in the sides, but NOT the exact side lengths and NOT the angles.
Fact 1 is INSUFFICIENT
2) Tells us the angles in the shape, but NOT the exact side lengths.
Fact 2 is INSUFFICIENT
Combined, we know...
The difference in the sides, but NOT the exact side lengths
The angles
As the side lengths become proportionately bigger, the difference between them will also become proportionately bigger. Thus, there are an unlimited number of answers to this question.
Combined, INSUFFICIENT
Final Answer: E
GMAT assassins aren't born, they're made,
Rich
This DS question is a 'concept' question - you don't have to really do any 'math' to solve it, but you do need to understand the concepts involved. We know that we're dealing with a parallelogram and we're asked for the difference in the lengths of the two diagonals within that shape. To answer this question, we need to know the exact lengths of the sides AND the angles within this shape.
1) Tells us the difference in the sides, but NOT the exact side lengths and NOT the angles.
Fact 1 is INSUFFICIENT
2) Tells us the angles in the shape, but NOT the exact side lengths.
Fact 2 is INSUFFICIENT
Combined, we know...
The difference in the sides, but NOT the exact side lengths
The angles
As the side lengths become proportionately bigger, the difference between them will also become proportionately bigger. Thus, there are an unlimited number of answers to this question.
Combined, INSUFFICIENT
Final Answer: E
GMAT assassins aren't born, they're made,
Rich
