BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Measure on angle in a cube

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Master | Next Rank: 500 Posts
Posts: 434
Joined: Mon Jun 11, 2007 9:48 pm
Location: Bangalore
Thanked: 6 times
GMAT Score:600

Measure on angle in a cube

by viju9162 » Mon May 18, 2009 2:05 am
Hello Friends,

The question is about to find the angle within a cube. It goes like this:

What is the degree measure of ABC ?

A> 30
B> 45
C> 60
D> 75
E> 90

Please look at the attached document.
Attachments
Cube_angle.gif
Cube
Top
Source: — Problem Solving |
Master | Next Rank: 500 Posts
Posts: 418
Joined: Wed Jun 11, 2008 5:29 am
Thanked: 65 times

by bluementor » Mon May 18, 2009 2:13 am
Since this is a cube, points ABC will form a equilateral triangle (lengths AB, BC and AC are all the same). And we know that all three angles in an equilateral triangle are 60 degrees each.

Choose C.

-BM-
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 434
Joined: Mon Jun 11, 2007 9:48 pm
Location: Bangalore
Thanked: 6 times
GMAT Score:600

by viju9162 » Mon May 18, 2009 2:25 am
Hi,

Thanks for the explaination. I will be glad if you can explain in detail. I didnt quite understand how those lines formed a equilateral triangle?

Regards,
Viju
Top
Master | Next Rank: 500 Posts
Posts: 487
Joined: Fri Mar 27, 2009 5:49 am
Thanked: 36 times

by dtweah » Mon May 18, 2009 4:48 am
viju9162 wrote:Hi,

Thanks for the explaination. I will be glad if you can explain in detail. I didnt quite understand how those lines formed a equilateral triangle?

Regards,
Viju
Draw hypotenuse AC. then the three sides of ABC are hypotenuses of right triangles with the same side. That is why they are equal.
Top
Post new topic Post Reply
• Page 1 of 1