|
|
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.
17 Jul 2018, 23:22
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
67% (01:08) correct
33%
(01:32)
wrong
based on 103
sessions
History
Date
Time
Result
Not Attempted Yet
ABC is an equilateral triangle with point D on line BC such that AD = 4 units. What is the area of triangle ABC in square units?
(1) AD is perpendicular to BC.
(2) D is mid point of BC.
(1) AD is perpendicular to BC.
(2) D is mid point of BC.
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
18 Jul 2018, 00:09
Kudos
Bookmarks
ABC is an equilateral triangle with point D on line BC such that AD = 4 units. What is the area of triangle ABC in square units?
Look at the attached figure. In \(\triangle{ADB}\), we know one side and one angle thus the triangle can be of any size. so if we know ANY angle or ANY side, we can find all the sides as the triangle will be unique
(1) AD is perpendicular to BC.
If AD is perpendicular, AD is altitude and we can find sides and thus area of triangle
AD=4=\(side*\sqrt{3}/2\)
you can find side and thus area..
suff
(2) D is mid point of BC.
D is a midpoint means it is also perpendicular bisector
same as above
suff
D
Look at the attached figure. In \(\triangle{ADB}\), we know one side and one angle thus the triangle can be of any size. so if we know ANY angle or ANY side, we can find all the sides as the triangle will be unique
(1) AD is perpendicular to BC.
If AD is perpendicular, AD is altitude and we can find sides and thus area of triangle
AD=4=\(side*\sqrt{3}/2\)
you can find side and thus area..
suff
(2) D is mid point of BC.
D is a midpoint means it is also perpendicular bisector
same as above
suff
D
Attachments
3.png [ 5.48 KiB | Viewed 2683 times ]
