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17 Sep 2009, 08:23
Kudos
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B
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Difficulty:
65%
(hard)
Question Stats:
53% (01:53) correct
47%
(02:11)
wrong
based on 443
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In the figure to the right, if point C is the center of the circle and DB = 7, what is the length of DE?
(1) x = 60°
(2) DE || CA
Attachment:
triangle.jpg [ 10.43 KiB | Viewed 32191 times ]
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
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17 Sep 2009, 10:02
Kudos
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I wud go with option B.
Line joining the midpoint and parallel to the third side will be half the length of the third side.So statement 2 states it is parallel to the third side.So DE = 7 cm.
I wud go with option B
Line joining the midpoint and parallel to the third side will be half the length of the third side.So statement 2 states it is parallel to the third side.So DE = 7 cm.
I wud go with option B
04 May 2013, 10:56
Kudos
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The correct answer is B.
Using similar triangles properties we can solve the question.
\(\frac{BC}{DB}=\frac{AC}{DE}\) \(\frac{3.5}{7}=\frac{3.5}{DE}\)
What you say (that A is sufficient) is not correct; you are assuming that DE || CA in your solution
Take a look at the picture, should be clear enough
BTW "we can use Tan": in GMAT you don't need trigonometry
Using similar triangles properties we can solve the question.
\(\frac{BC}{DB}=\frac{AC}{DE}\) \(\frac{3.5}{7}=\frac{3.5}{DE}\)
What you say (that A is sufficient) is not correct; you are assuming that DE || CA in your solution
Take a look at the picture, should be clear enough
BTW "we can use Tan": in GMAT you don't need trigonometry
Attachments
lengthoflinede.jpg [ 12.26 KiB | Viewed 28777 times ]
