Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 25 May 2017, 02:16

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

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

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
VP
Joined: 26 Apr 2004
Posts: 1213
Location: Taiwan
Followers: 2

Kudos [?]: 687 [0], given: 0

In the xy-plane, point (r, s) lies on a circle with center [#permalink]

### Show Tags

16 Aug 2004, 21:29
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

In the xy-plane, point (r, s) lies on a circle with center at the origin. What is the value of r2 + s2 ?

(1) The circle has radius 2.
(2) The point (v2, -v2) lies on the circle.

please explain, thank you
Senior Manager
Joined: 25 Jul 2004
Posts: 273
Followers: 1

Kudos [?]: 10 [0], given: 0

### Show Tags

16 Aug 2004, 22:29
is this r^2 + s^2?

If so I would Say A.

If not I would Say E.
VP
Joined: 26 Apr 2004
Posts: 1213
Location: Taiwan
Followers: 2

Kudos [?]: 687 [0], given: 0

### Show Tags

17 Aug 2004, 08:13
Yes, indeed , r^2 + s^2,

thank you
CEO
Joined: 15 Aug 2003
Posts: 3454
Followers: 67

Kudos [?]: 874 [0], given: 781

### Show Tags

17 Aug 2004, 23:15
can anyone explain this to the author please?

thanks
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5045
Location: Singapore
Followers: 31

Kudos [?]: 376 [0], given: 0

### Show Tags

18 Aug 2004, 00:54
If (r,s) lies on the circle, then if we are told the radius, we can find out r^2 + s^2 using pythagoras theorem

(1) If radius is 2, then r^2+s^2 = 4. So (1) is sufficient

(2) is not sufficient, as we do not have a radius to equate and no other information pertaining to v2 and -v2 is given

So (A) is the answer
18 Aug 2004, 00:54
Display posts from previous: Sort by

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

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.