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31 Jul 2010, 11:37
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
88% (00:50) correct
13%
(00:35)
wrong
based on 24
sessions
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Time
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Not Attempted Yet
From question stem, how to identify the similar angle in isosceles triangle.
Attachment:
GMATPrep I - maths 7.JPG
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31 Jul 2010, 11:39
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Apologies...looks attachment is not proper.
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GMATPrep I - maths 7.JPG [ 67.23 KiB | Viewed 2775 times ]
31 Jul 2010, 23:45
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You need to take into account that the three angles in a triangle must add to 180 degrees. We know two angles are equal in an isosceles triangle. If we know that one angle is 100 degrees, then we can't have another 100 degree angle - then the sum of the angles would be greater than 180. So if Statement 1 is true, then the two smaller angles must be equal; we must have the angles 100, 40 and 40.
If, however, Statement 2 is true, then we have two possibilities: the two smaller angles might be equal, and we may have angles measuring 40, 40 and 100 degrees, or the two larger angles might be equal, and we may have angles measuring 40, 70 and 70 degrees.
If, however, Statement 2 is true, then we have two possibilities: the two smaller angles might be equal, and we may have angles measuring 40, 40 and 100 degrees, or the two larger angles might be equal, and we may have angles measuring 40, 70 and 70 degrees.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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