In the figure below, AB is the chord of a circle...

This topic has expert replies
Moderator
Posts: 1991
Joined: 15 Oct 2017
Followed by:6 members
In the figure below, AB is the chord of a circle with center O. AB is extended to C such that BC = OB. The straight line CO is produced to meet the circle at D. If ACD = y degrees and AOD = x degrees such that x = ky, then the value of k is?

Image
A. 3
B. 2
C. 1
D. None of the above

The OA is A.

I'm really confused by this PS question. Experts, any suggestion about how can I solve it? Thanks in advance.

User avatar
Legendary Member
Posts: 2663
Joined: 14 Jan 2015
Location: Boston, MA
Thanked: 1153 times
Followed by:128 members
GMAT Score:770

by [email protected] » Thu Mar 08, 2018 12:02 pm
LUANDATO wrote:In the figure below, AB is the chord of a circle with center O. AB is extended to C such that BC = OB. The straight line CO is produced to meet the circle at D. If ACD = y degrees and AOD = x degrees such that x = ky, then the value of k is?

Image
A. 3
B. 2
C. 1
D. None of the above

The OA is A.

I'm really confused by this PS question. Experts, any suggestion about how can I solve it? Thanks in advance.
This question is a variation on an official problem. I'd suggest going through this thread and then reattempting: https://www.beatthegmat.com/geometry-ds ... tml#507922
Veritas Prep | GMAT Instructor

Veritas Prep Reviews
Save $100 off any live Veritas Prep GMAT Course