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#### Circular Logic CAT 6

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 Post subject: Circular Logic CAT 6  Posted: Wed Aug 08, 2012 10:35 am
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 What is the radius of the circle pictured above?(1) The measure of arc PQ is 4pi.(2) The center of the circle is at point O.Even if we were told that angle POQ is 90 degrees, how do we know that Statement 1 is talking about the minor arc AB and not about the major arc AB?? Is it right to assume it as minor arc AB?Have my GMAT in 2 days. Please answer.

 Post subject: Re: Circular Logic CAT 6  Posted: Thu Aug 09, 2012 3:02 pm
 ManhattanGMAT Staff

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Location: Southwest Airlines, seat 21C
 arc designations always refer to minor arcs unless there is specific information to indicate the major arc.. _________________Tim SandersManhattan GMAT Instructor

 Post subject: Re: Circular Logic CAT 6  Posted: Fri Aug 10, 2012 8:20 am
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 ok. thanks a lot

 Post subject: Re: Circular Logic CAT 6  Posted: Fri Aug 10, 2012 6:54 pm
 ManhattanGMAT Staff

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 :-) _________________Jamie NelsonManhattanGMAT Instructor

 Post subject: Re: Circular Logic CAT 6  Posted: Tue Aug 14, 2012 12:49 pm
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 Is the answer for this option E since even though we know the angle of the arc, we are not told the circumference of the circle?

 Post subject: Re: Circular Logic CAT 6  Posted: Sun Aug 19, 2012 3:26 pm
 ManhattanGMAT Staff

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 krishnan.anju1987 wrote:Is the answer for this option E since even though we know the angle of the arc, we are not told the circumference of the circle?Our biggest problem is that we do not know the angle creating that arc. If we knew that the angle were 90 degrees, then we would know that the arc would be 1/4 of the circumference. If we then know the arc measure, we could calculate the circumference and thus figure out the radius. However, we never learn whether the arc is 90 degrees, 91, 89, etc. _________________Jamie NelsonManhattanGMAT Instructor

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