GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 21 Oct 2019, 13:16

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.

Close

Request Expert Reply

Confirm Cancel

The point O is the center of the circle circumscribed about triangle A

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 58396
The point O is the center of the circle circumscribed about triangle A  [#permalink]

Show Tags

New post 26 Mar 2019, 22:57
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

94% (00:50) correct 6% (01:13) wrong based on 16 sessions

HideShow timer Statistics

Image
The point O is the center of the circle circumscribed about triangle ABC, with angle BOC = 120° and angle AOB = 140°, as shown. What is the degree measure of angle ABC°?

(A) 35
(B) 40
(C) 45
(D) 50
(E) 60


Attachment:
2007_12B_AMC-3.png
2007_12B_AMC-3.png [ 13.65 KiB | Viewed 415 times ]

_________________
Manager
Manager
avatar
B
Joined: 27 Mar 2016
Posts: 110
GMAT ToolKit User
Re: The point O is the center of the circle circumscribed about triangle A  [#permalink]

Show Tags

New post 26 Mar 2019, 23:03
D
50
Angle AOC = 100
Angle at the circumference should be half of the angle at the centre hence ABC = 50

Posted from my mobile device
Director
Director
User avatar
V
Joined: 06 Jan 2015
Posts: 689
Location: India
Concentration: Operations, Finance
GPA: 3.35
WE: Information Technology (Computer Software)
Re: The point O is the center of the circle circumscribed about triangle A  [#permalink]

Show Tags

New post 26 Mar 2019, 23:07
Bunuel wrote:
Image
The point O is the center of the circle circumscribed about triangle ABC, with angle BOC = 120° and angle AOB = 140°, as shown. What is the degree measure of angle ABC°?

(A) 35
(B) 40
(C) 45
(D) 50
(E) 60


Attachment:
2007_12B_AMC-3.png


angle AOC = 360-(140+120) = 100

angle AOC = 2 angle ABC

angle ABC = 100/2 = 50

Hence D
_________________
आत्मनॊ मोक्षार्थम् जगद्धिताय च

Resource: GMATPrep RCs With Solution
GMAT Club Legend
GMAT Club Legend
User avatar
D
Joined: 18 Aug 2017
Posts: 5027
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
GMAT ToolKit User Premium Member
Re: The point O is the center of the circle circumscribed about triangle A  [#permalink]

Show Tags

New post 27 Mar 2019, 00:53
Bunuel wrote:
Image
The point O is the center of the circle circumscribed about triangle ABC, with angle BOC = 120° and angle AOB = 140°, as shown. What is the degree measure of angle ABC°?

(A) 35
(B) 40
(C) 45
(D) 50
(E) 60


Attachment:
2007_12B_AMC-3.png


∆ AOB = x=180-140 ; 40 so ABO= 20
and ∆ BOC ; 180-120 ; 60 angle OBC= 30
so angle ABC= 50
IMO D
GMAT Club Bot
Re: The point O is the center of the circle circumscribed about triangle A   [#permalink] 27 Mar 2019, 00:53
Display posts from previous: Sort by

The point O is the center of the circle circumscribed about triangle A

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne