Register    Login    Search    Rss Feeds

Forums Home » Ask An Instructor » GMAT Math » General Math Questions


 Page 1 of 1 [ 5 posts ] 



  Print view Print view Previous topic Previous topic | Next topic Next topic
 

* In the xy-plane, point (r,s) lies on a circle with centre

Author Message
fahadmuhammad86
 Post subject: * In the xy-plane, point (r,s) lies on a circle with centre
 Post Posted: Wed Oct 14, 2009 7:53 pm 
Offline
Students


Posts: 11
In the xy-plane, point (r,s) lies on a circle with centre at origin. What is the value of r^2+s^2?
1) Radius=2
2) The point sqrt2,-sqrt 2 lies on the circle.

Answer is D.

Im an a little confused about statement 2. How does sqrt2,-sqrt 2 represent (r,s)? It just says that its another point lying on the circle.
Top 
kanikagoyal
 Post subject: Re: In the xy-plane, point (r,s) lies on a circle with centre
 Post Posted: Thu Oct 15, 2009 2:37 am 
Offline
Forum Guests


Posts: 2
R^2 + S^2 is = the radius^2 of the circle as a right triangle is formed (x=r when y=0 and y=s when x=0)

ie. R^2 + S^2= 2^2=4 (square of radius)

Similarily, R^2 + S^2= (Sqrt2)^2 + (-sqrt2)^2= 4
Top 
Ben Ku
 Post subject: Re: In the xy-plane, point (r,s) lies on a circle with centre
 Post Posted: Thu Oct 29, 2009 1:08 am 
Offline
ManhattanGMAT Staff


Posts: 823
Please cite the source (author) of this problem. We cannot reply unless a source is cited (and, if no source is cited, we will have to delete the post!). Thanks.

_________________
Ben Ku
Instructor
ManhattanGMAT
Top 
taniafconca
 Post subject: Re: * In the xy-plane, point (r,s) lies on a circle with centre
 Post Posted: Tue Oct 11, 2011 3:59 pm 
Offline
Course Students


Posts: 6
This is a question from the second edition verbal book #22.
Explaination would be helpful...
Top 
jnelson0612
 Post subject: Re: * In the xy-plane, point (r,s) lies on a circle with centre
 Post Posted: Sat Oct 29, 2011 11:57 pm 
Offline
ManhattanGMAT Staff


Posts: 1857
taniafconca wrote:
This is a question from the second edition verbal book #22.
Explaination would be helpful...


Do you mean the second edition quantitative book? If so, this source is not allowed on this site; the GMAC does not allow their copyrighted material to be used on this forum.

_________________
Jamie Nelson
ManhattanGMAT Instructor
Top 
Display posts from previous:  Sort by  
 
 Page 1 of 1 [ 5 posts ] 





Who is online

Users browsing this forum: No registered users and 0 guests

 
 

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: