Find all School-related info fast with the new School-Specific MBA Forum

It is currently 21 Aug 2014, 16:26

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

M11 #32

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 25 May 2009
Posts: 145
Concentration: Finance
GMAT Date: 12-16-2011
Followers: 1

Kudos [?]: 39 [0], given: 2

M11 #32 [#permalink] New post 01 Jul 2009, 19:34
If a square is inscribed in a circle of radius 4, what is the area of the square?

(C) 2008 GMAT Club - m11#32

* 8
* 16
* 32
* 48
* 64

[Reveal] Spoiler:
The diameter of the circle is the diagonal of the square. The side of the square is 2*\sqrt{8} , therefore the area of the square is 32. The correct answer is C.

How do you get 2*sqrt(8) for each side? I was getting 4 which is x^2+x^2=8^2, so x=4. Please explain how do solve for the sides using Pythagorean theorem.
Kaplan GMAT Prep Discount CodesKnewton GMAT Discount CodesVeritas Prep GMAT Discount Codes
Manager
Manager
avatar
Joined: 30 May 2009
Posts: 220
Followers: 3

Kudos [?]: 52 [0], given: 0

GMAT Tests User
Re: M11 #32 [#permalink] New post 01 Jul 2009, 19:57
If a square is inscribed in a circle of radius 4, what is the area of the square?

* 8
* 16
* 32
* 48
* 64

The diameter is 8 = Diagonal of the square.
But diagonal of a square with side a = a\sqrt{2}
Hence if 8 = a\sqrt{2}, then we can see that side of the sqaure = a = \frac{8}{\sqrt{2}}
Therefore, area = a^2 = \left(\frac{8}{\sqrt{2}}\right)^2 = 32
Manager
Manager
avatar
Joined: 25 May 2009
Posts: 145
Concentration: Finance
GMAT Date: 12-16-2011
Followers: 1

Kudos [?]: 39 [0], given: 2

Re: M11 #32 [#permalink] New post 02 Jul 2009, 04:09
Still not understanding. Any help?
I think its a notation problem above. what does the /\ mean?
Manager
Manager
avatar
Joined: 25 May 2009
Posts: 145
Concentration: Finance
GMAT Date: 12-16-2011
Followers: 1

Kudos [?]: 39 [0], given: 2

Re: M11 #32 [#permalink] New post 07 Jul 2009, 04:00
sdrandom1 wrote:
If a square is inscribed in a circle of radius 4, what is the area of the square?

The diameter is 8 = Diagonal of the square.
But diagonal of a square with side a = a\sqrt{2}
Hence if 8 = a\sqrt{2}, then we can see that side of the sqaure = a = 8/\sqrt{2}
Therefore, area = a^2 = (8/\sqrt{2})^2 = 32


Got it now, the math formulas weren't working, its easier to understand now above. Thanks sdrandom1.
CIO
CIO
avatar
Joined: 02 Oct 2007
Posts: 1218
Followers: 87

Kudos [?]: 650 [0], given: 334

GMAT ToolKit User GMAT Tests User
Re: M11 #32 [#permalink] New post 07 Jul 2009, 05:25
I've edited the post above so that math expressions work.

In order for the math expressions to work fine, one needs to enclose the whole expression in the "m" tag, which is next to the "fraction" tag in the edit page. This won't work (without the "m" tag):

Code:
[square_root]x^2 -2x +1[/square_root] = [square_root](x-1)^2[/square_root] = |x-1|

\sqrt{x^2 -2x +1} = \sqrt{(x-1)^2} = |x-1|

This will work (just add the "m" tag):

Code:
[m][square_root]x^2 -2x +1[/square_root] = [square_root](x-1)^2[/square_root] = |x-1|[/m]

\sqrt{x^2 -2x +1} = \sqrt{(x-1)^2} = |x-1|

Remember to use only one "m" tag for the whole expression, no need to enclose every single unit in it.

Hope this helps.
_________________

Welcome to GMAT Club! :)
Facebook TwitterGoogle+LinkedIn
Want to solve GMAT questions on the go? GMAT Club iPhone app will help.
Please read this before posting in GMAT Club Tests forum
Result correlation between real GMAT and GMAT Club Tests
Are GMAT Club Test sets ordered in any way?

Take 15 free tests with questions from GMAT Club, Knewton, Manhattan GMAT, and Veritas.

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Re: M11 #32   [#permalink] 07 Jul 2009, 05:25
    Similar topics Author Replies Last post
Similar
Topics:
14 Experts publish their posts in the topic M11 #26 topmbaseeker 32 24 Jan 2009, 13:18
13 Experts publish their posts in the topic m11#30 georgechanhc 20 31 Dec 2008, 21:20
Experts publish their posts in the topic m11,#8 ritula 13 11 Nov 2008, 22:35
20 Experts publish their posts in the topic m11#9 amitdgr 9 01 Nov 2008, 07:23
2 M11 #03 dczuchta 2 01 Oct 2008, 14:20
Display posts from previous: Sort by

M11 #32

  Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: Bunuel, WoundedTiger



GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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®.