Last visit was: 25 Apr 2026, 15:14 It is currently 25 Apr 2026, 15:14
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
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 25 Apr 2026
Posts: 109,830
Own Kudos:
811,273
 [1]
Given Kudos: 105,886
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 109,830
Kudos: 811,273
 [1]
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
User avatar
lacktutor
Joined: 25 Jul 2018
Last visit: 23 Oct 2023
Posts: 658
Own Kudos:
Given Kudos: 69
Posts: 658
Kudos: 1,447
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
Aviral1995
User avatar
Current Student
Joined: 13 Apr 2019
Last visit: 23 May 2022
Posts: 228
Own Kudos:
69
 [1]
Given Kudos: 309
Location: India
GMAT 1: 710 Q49 V36
GPA: 3.85
Products:
GMAT 1: 710 Q49 V36
Posts: 228
Kudos: 69
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
KarishmaB
Joined: 16 Oct 2010
Last visit: 23 Apr 2026
Posts: 16,441
Own Kudos:
Given Kudos: 485
Location: Pune, India
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 16,441
Kudos: 79,413
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Aviral1995
lacktutor
If AB || DE, that means z=x. Also, angle D equals to x.
Statement1: z=67.5
—> x=67.5, y =45. Triangle ABC is isosceles triangle, AC=BC. But there is no about ratios of sides of triangle.
Insufficient.

Statement2: AB+BC=10. No info about ratio of sides of triangle.
Insufficient.

Taken together 1 and 2, we got two isosceles triangles: ABC and CDE. But still no info about ratios of sides of triangles.
Insufficient
The answer choice is E.

Posted from my mobile device

Bunuel VeritasKarishma can we use property a/sinx=b/siny=c/sinz to find out the side??


Though we would never "need" to use trigonometry, there is no harm in using if you already know it well.
The rule is a/Sin A = b/Sin B = c/Sin C and is applicable for any triangle.
Let me know how you intend to use it and I will let you know if it makes sense.
Moderators:
Math Expert
109830 posts
498 posts
212 posts