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In the xy-plane

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In the xy-plane

by bhumika.k.shah » Fri Jan 22, 2010 9:49 am
In the xy-plane, the point (-2, -3) is the center of a circle. The point (-2, 1) lies inside the
circle and the point (4, -3) lies outside the circle. If the radius r of the circle is an integer,
then r =

A. 6
B. 5
C. 4
D. 3
E. 2

OA B

Can someone kindly explain in detail coz i really dont know how to go about with these kinda sums :-(
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by Brent@GMATPrepNow » Fri Jan 22, 2010 11:11 am
bhumika.k.shah wrote:In the xy-plane, the point (-2, -3) is the center of a circle. The point (-2, 1) lies inside the
circle and the point (4, -3) lies outside the circle. If the radius r of the circle is an integer,
then r =

A. 6
B. 5
C. 4
D. 3
E. 2

OA B

Can someone kindly explain in detail coz i really dont know how to go about with these kinda sums :-(
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by bhumika.k.shah » Fri Jan 22, 2010 11:39 am
thanks for the excellent explanation :-)

But could you tell me how to deal with such kinda sums ???
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by Brent@GMATPrepNow » Fri Jan 22, 2010 12:01 pm
bhumika.k.shah wrote:thanks for the excellent explanation :-)

But could you tell me how to deal with such kinda sums ???
What sums are you referring to?
Finding the distance between two points on the x-y plane?
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by bhumika.k.shah » Fri Jan 22, 2010 12:03 pm
yes
i am fine till plotting the points of the circle on the xy plane.But then dont know how to go ahead with it.
Which two lines to join? which co-ordinates will help me get a solution...
:-(
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by Lattefah84 » Fri Jan 22, 2010 12:18 pm
Brent Hanneson wrote:
bhumika.k.shah wrote:thanks for the excellent explanation :-)

But could you tell me how to deal with such kinda sums ???
What sums are you referring to?
Finding the distance between two points on the x-y plane?
actually, there is a possibility to make a mistake when drowing freely, right?
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