It is currently 17 Nov 2017, 16:42

### 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

# Right Angled Triangle

Author Message
Director
Joined: 21 Sep 2004
Posts: 601

Kudos [?]: 36 [0], given: 0

### Show Tags

25 Dec 2004, 21:49
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

can somebody explain this one.
Attachments

rightangletriangle.gif [ 22.77 KiB | Viewed 1017 times ]

Kudos [?]: 36 [0], given: 0

Intern
Joined: 26 Dec 2004
Posts: 6

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

### Show Tags

26 Dec 2004, 17:03
I am getting the answer as C: 9,900.

For point P, x & y can be chosen in 10*11 ways (10 possible x coord. values. 11 possible Y coordinate values. Once P is chosen, the y coordinate of R is fixed since PR is || to X axis. Therefore x coordinate for R can be one of (10 - 1) = 9 values. -1 because it cannot be same as P.

Similarly, Q has same X coordinate as P, but Y coordinate could be any of (11 - 1) values.

therefore total number of right angled triangles = 10*11*9*10 = 9,900

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

26 Dec 2004, 17:03
Display posts from previous: Sort by

# Right Angled Triangle

Moderator: chetan2u

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne 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®.