I've attached my picture; my notes are in blue. Hopefully it : DS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 21 Jan 2017, 18:31

### 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

# Events & Promotions

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

# I've attached my picture; my notes are in blue. Hopefully it

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Manager
Joined: 09 Feb 2006
Posts: 129
Location: New York, NY
Followers: 1

Kudos [?]: 7 [0], given: 0

I've attached my picture; my notes are in blue. Hopefully it [#permalink]

### Show Tags

15 Apr 2006, 14:25
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.

I've attached my picture; my notes are in blue. Hopefully it makes sense.
Attachments

triangle.jpg [ 37.83 KiB | Viewed 611 times ]

Last edited by jcgoodchild on 15 Apr 2006, 14:27, edited 1 time in total.
Manager
Joined: 09 Feb 2006
Posts: 129
Location: New York, NY
Followers: 1

Kudos [?]: 7 [0], given: 0

### Show Tags

15 Apr 2006, 14:27
Sorry, I meant the answer is A in my picture. We only need to know that length. I'll edit, and repost it.
Senior Manager
Joined: 11 Nov 2005
Posts: 328
Location: London
Followers: 1

Kudos [?]: 11 [0], given: 0

### Show Tags

15 Apr 2006, 14:38
A.

Your explanation is quite right, but the answe should be A.

AD=BD (ISOSCLE) = 6

BD = BC = 6, (isoscale)

jcgoodchild wrote:
I've attached my picture; my notes are in blue. Hopefully it makes sense.
Manager
Joined: 08 Feb 2006
Posts: 126
Followers: 1

Kudos [?]: 9 [0], given: 0

### Show Tags

15 Apr 2006, 15:23
how did you know that the left angle is x degree?

I understood the 180-2x and 180-4x.
VP
Joined: 21 Sep 2003
Posts: 1065
Location: USA
Followers: 3

Kudos [?]: 73 [0], given: 0

### Show Tags

15 Apr 2006, 15:32
Another easy way out:

Angle BDC is an Exterior angle of the triangle BAD. And in any traingle exterior angle is equal to the sum of the interior opposite angles. Hence

BDC = BAD + ABD
2x = x + ABD
=> ABD = x
Hence triangle BAD is isoceles
=> AD = BD = 6
_________________

"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."

- Bernard Edmonds

15 Apr 2006, 15:32
Display posts from previous: Sort by

# I've attached my picture; my notes are in blue. Hopefully it

 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®.