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22 Square or not

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Source: — Data Sufficiency |
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by iamseer » Sat May 01, 2010 8:03 am
IMO E

From 1:
parallelogram could be a rhombus, rectangle or square
NOT SUFFICIENT

From 2:
parallelogram could be a rectangle or square

combining 1 and 2:
parallelogram still be a rectangle or a square

therefore E
"Choose to chance the rapids and dance the tides"
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by beat_gmat_09 » Sat May 01, 2010 8:03 am
ern5231 wrote:Is the parallelogram ABCD a square?
1)Angle ABC= Angle BCD
2)The parallelogram has equal diagonals

I feel the answer should be E. What do you say?
Only when a parallelogram is a square its diagonals are equal.

IMO B.
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by beat_gmat_09 » Sat May 01, 2010 8:19 am
beat_gmat_09 wrote:
ern5231 wrote:Is the parallelogram ABCD a square?
1)Angle ABC= Angle BCD
2)The parallelogram has equal diagonals

I feel the answer should be E. What do you say?
Only when a parallelogram is a square its diagonals are equal.

IMO B.

got really bad on this one (rectangle too has equal diagonals). need to brush my geometry concepts :)
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by tryingtocrack » Sun May 02, 2010 7:22 am
E

For any || gm to be square

all sides to be equal
diagonals to be equal
opposite angles to be equal and all angles should be 90
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