Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

In the figure above, if \(AD\) is parallel to \(BC,\) then \(\angle ADC=\angle ADC=\)

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Moderator
Posts: 2058
Joined: Sun Oct 29, 2017 4:24 amFollowed by: 5 members
Thanked: 1 times
by M7MBA » Sun Nov 28, 2021 1:16 am
Timer
00:00
Your answer
Difficulty–

right wrong

Pick an answer to see how members did

1.jpg
In the figure above, if \(AD\) is parallel to \(BC,\) then \(\angle ADC=\angle ADC=\)

A. \(11^{\circ}\)

B. \(22^{\circ}\)

C. \(33^{\circ}\)

D. \(46^{\circ}\)

E. \(134^{\circ}\)

Answer: C

Source: Princeton Review
You do not have the required permissions to view the files attached to this post.
Top
Join the discussion
Source: — Problem Solving |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16206
Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members
Location: Vancouver, BC
Thanked: 5254 times
GMAT Score:770

Re: In the figure above, if \(AD\) is parallel to \(BC,\) then \(\angle ADC=\angle ADC=\)

by Brent@GMATPrepNow » Sun Nov 28, 2021 6:47 am
M7MBA wrote: ↑
Sun Nov 28, 2021 1:16 am
 1.jpg

In the figure above, if \(AD\) is parallel to \(BC,\) then \(\angle ADC=\angle ADC=\)

A. \(11^{\circ}\)

B. \(22^{\circ}\)

C. \(33^{\circ}\)

D. \(46^{\circ}\)

E. \(134^{\circ}\)

Answer: C

Source: Princeton Review
First, since angles in a triangle must add to 180°, we can see that the missing angle in the red triangle must be 180° - (x + 44)°
Image


Simplify this measurement to get (136 - x)°
Image


Finally, since AD is parallel to BC, we know that the two highlighted angles below must add to 180°.
Image

So, we can write: (136 - x)° + 2x° + 3x° = 180°
Simplify: 136 + 4x = 180
Subtract 136 from both sides: : 4x = 44
Solve: x = 11

Our goal is to find the measurement of ∠ADC
Since ∠ADC = 3x°, we can replace x with 11 to get: ∠ADC = 3x° = 3(11)° = 33°

Answer: C
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion