Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Sep 1312:30 AM EDT
-01:30 AM EDT
Struggling to find the right strategies to score a 99 %ile on GMAT Focus? Riya (GMAT 715) boosted her score by 100-points in just 15 days! Discover how the right mentorship, tailored strategies, and an unwavering mindset can transform your GMAT prep.
Sep 1301:30 AM EDT
-02:30 AM EDT
At one point, she believed GMAT wasn’t for her. After scoring 595, self-doubt crept in and she questioned her potential. But instead of quitting, she made the right strategic changes. The result? A remarkable comeback to 695. Check out how Saakshi did it.
Sep 1507:00 PM EDT
-09:00 PM EST
Elite scores are possible when you enroll in a powerful GMAT course, taught live online + 6 months access to TTP OnDemand video courses included! Class starts Tues/Thurs Sept. 15, 2026 - Nov. 15, 2027, 7:00pm-9:00pm EST
Sep 1808:00 PM PDT
-09:00 PM PDT
Video explanations + diagnosis of 10 weakest areas + 150+ short videos + study plan!
Sep 2107:00 PM EDT
-10:00 PM EDT
Boost your GMAT score in less than one month in a live online class + 6 months access to TTP OnDemand video courses included! Class starts Mon, Tues, Wed, Thur, Fri Sept. 21, 2026 - Oct. 9, 2027, 7:00pm-10:00pm EST
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
74% (02:29) correct
26%
(02:44)
wrong
based on 68
sessions
History
Date
Time
Result
Not Attempted Yet
Note: Figure not drawn to scale
If AD is the same length as DC, what is the area of the parallelogram shown?
A. \(\frac{25\sqrt{3}}{2}\)
B. 25
C. \(25\sqrt{3}\)
D. \(\frac{75\sqrt{3}}{2}\)
E. \(50\sqrt{3}\)
Attachment:
image023.jpg [ 4.2 KiB | Viewed 2773 times ]
_________________
New to the GMAT Club?
- • Questions: Question Bank | Bunuel's Signature Collection
• Tests: GMAT Club Tests | Forum Quiz
• Guides: Quantitative | Critical Reasoning | Reading Comprehension | Ultimate Quant Guide | All You Need for Quant
• Rules: Quantitative | Verbal
saurabh9gupta
Joined: 10 Jan 2013
Last visit: 24 May 2026
Posts: 251
Location: India
Concentration: General Management, Strategy
Schools: Kenan-Flagler '24 (D)
GRE 1: Q163 V155
GPA: 3.95
Products:
Since the adjacent angles are supplementary. We can calculate the other angles..
If we drop a perpendicular bisector to the diagonal.. we will get 2 triangles following the 30 60 90 rule.
E
Posted from my mobile device
If we drop a perpendicular bisector to the diagonal.. we will get 2 triangles following the 30 60 90 rule.
E
Posted from my mobile device
Posts: 165
You can find the 2nd diagonal using the formula (side)^2 = (1/2* d1)^2 + (1/2 d2)^2
Then area = 1/2 * d1*d2
Ans E
Then area = 1/2 * d1*d2
Ans E
Using cosine formula of area,
10*10*sin(120)=\(100*\sqrt{3}/2\)=\(50\sqrt{3}\)
Ans. (E)
10*10*sin(120)=\(100*\sqrt{3}/2\)=\(50\sqrt{3}\)
Ans. (E)
souvonik2k
Retired Moderator
Joined: 25 Nov 2015
Last visit: 05 Dec 2021
Posts: 948
Status:Preparing for GMAT
Location: India
GPA: 3.64
Products:
Posts: 948
Bunuel
Since the adjacent sides are equal, opposite angles are parallel and internal angles are not 90, it is a rhombus.
In rhobus, diagonals bisect each other at rt angles.
Suppose diagonals bisect at O.
In triangle OAB, OA=\(5\sqrt{3}\)
OB = 5 as it is a 30-60-90 triangle.
BD=10
Area=1/2* Product of diagonals = \(\frac{1}{2}*10*10\sqrt{3}=50\sqrt{3}\)
Answer E.
Posts: 57
how do u know it is a 30-60-90 triangle.
Automated notice from GMAT Club BumpBot:
A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.
This post was generated automatically.
_________________
A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.
This post was generated automatically.
_________________
Moderator:
Announcements
How to Tell If Your GMAT Prep Resources Are Actually Helping You
Subscribe to GMAT Club for New Podcast Episodes, Debriefs, & Insightful Sessions on GMAT Preparation
Subscribe to GMAT Club for New Podcast Episodes, Debriefs, & Insightful Sessions on GMAT Preparation
Tuck at Dartmouth
AI at Dartmouth Tuck: How the School Is Preparing Leaders for the Age of Artificial Intelligence
Inside the courses, research, and hands-on learning defining wise, decisive leadership in an AI-driven world.
Read More
Inside the courses, research, and hands-on learning defining wise, decisive leadership in an AI-driven world.
Read More
Top 5 GMAT Debrief Videos
Success stories and strategies from high-scoring candidates.