gud n tuf ...ques..

This topic has expert replies
Source: — Problem Solving |

Master | Next Rank: 500 Posts
Posts: 136
Joined: Sun Sep 28, 2008 8:20 pm
Location: fssf
Thanked: 17 times

by krazy800 » Tue Oct 07, 2008 1:33 am
is it 90.. OA PLZ
Aiming High

Legendary Member
Posts: 833
Joined: Mon Aug 04, 2008 1:56 am
Thanked: 13 times

by vivek.kapoor83 » Tue Oct 07, 2008 1:36 am
NO its not 90

Legendary Member
Posts: 833
Joined: Mon Aug 04, 2008 1:56 am
Thanked: 13 times

by vivek.kapoor83 » Tue Oct 07, 2008 3:11 am
here is the attachement of ques
Attachments
Untitled.jpg

User avatar
Legendary Member
Posts: 871
Joined: Wed Aug 13, 2008 7:48 am
Thanked: 48 times

by stop@800 » Tue Oct 07, 2008 3:17 am

Legendary Member
Posts: 833
Joined: Mon Aug 04, 2008 1:56 am
Thanked: 13 times

by vivek.kapoor83 » Tue Oct 07, 2008 3:23 am
u r gem man..pls explain how

User avatar
Legendary Member
Posts: 871
Joined: Wed Aug 13, 2008 7:48 am
Thanked: 48 times

by stop@800 » Tue Oct 07, 2008 3:38 am
BEG is a triangle formed by three diagonals of the cube.
All diagonals are equal in length so triangle would be equilateral
hence each angle is 60 degree.

I have incorrectly answered this questions twice so remember the answer :)

Edit reason: Corrected the typo.
Last edited by stop@800 on Wed Oct 08, 2008 1:11 am, edited 1 time in total.

Master | Next Rank: 500 Posts
Posts: 136
Joined: Sun Sep 28, 2008 8:20 pm
Location: fssf
Thanked: 17 times

by krazy800 » Tue Oct 07, 2008 3:48 am
Thanks stop 4 the explaination
Aiming High

Legendary Member
Posts: 833
Joined: Mon Aug 04, 2008 1:56 am
Thanked: 13 times

by vivek.kapoor83 » Tue Oct 07, 2008 4:15 am
that means.u also say its 90 degree bt ans is 60

Master | Next Rank: 500 Posts
Posts: 136
Joined: Sun Sep 28, 2008 8:20 pm
Location: fssf
Thanked: 17 times

by krazy800 » Tue Oct 07, 2008 5:15 am
no Vivek i goofed it up.. so i thanked him for giving me a right answer n gud explaination..

thanks for the question though!
Aiming High

User avatar
Legendary Member
Posts: 871
Joined: Wed Aug 13, 2008 7:48 am
Thanked: 48 times

by stop@800 » Wed Oct 08, 2008 1:10 am
there si a typo
Each angle will be 60 degree
by mistake I wrote 90 degree

I will correct my prev post....

Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Tue Aug 10, 2010 5:29 am

by parasarora » Tue Aug 10, 2010 5:31 am
according to me, the answer is 90 degrees. the line segment BE and EG lie in perpendicular planes.

Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Mon Mar 16, 2009 3:56 am

by mastvita » Wed Oct 13, 2010 12:33 pm
I am opening this question again because I have a query.
Aren't diagonals of the square bisectors? If so each angle will be 45 and the ans should be 90?
Please explain...

Junior | Next Rank: 30 Posts
Posts: 12
Joined: Thu Aug 12, 2010 6:25 pm

by Viktri » Wed Oct 13, 2010 10:51 pm
mastvita wrote:I am opening this question again because I have a query.
Aren't diagonals of the square bisectors? If so each angle will be 45 and the ans should be 90?
Please explain...
B to E is diagonal on a face
so is BG and EG

Therefore, the 3 lengths are equal and they form an equilateral triangle, therefore the answer is 60