• 5 Day FREE Trial
Study Smarter, Not Harder

Available with Beat the GMAT members only code

• FREE GMAT Exam
Know how you'd score today for $0 Available with Beat the GMAT members only code • Free Practice Test & Review How would you score if you took the GMAT Available with Beat the GMAT members only code • Free Trial & Practice Exam BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • Get 300+ Practice Questions 25 Video lessons and 6 Webinars for FREE Available with Beat the GMAT members only code • 1 Hour Free BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • Award-winning private GMAT tutoring Register now and save up to$200

Available with Beat the GMAT members only code

• Free Veritas GMAT Class
Experience Lesson 1 Live Free

Available with Beat the GMAT members only code

• Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

• 5-Day Free Trial
5-day free, full-access trial TTP Quant

Available with Beat the GMAT members only code

# What is the perimeter of the figure...

tagged by: BTGmoderatorLU

### Top Member

#### What is the perimeter of the figure...

What is the perimeter of the figure above? (Note, figure not necessarilly drawn to scale).

A) 155.
B) 185.
C) 220.
D) 235.
E) 250.

The OA is E.

I'm really confused with this PS question. Please, can any expert assist me with it? Thanks in advanced.

### GMAT/MBA Expert

GMAT Instructor
Joined
08 Dec 2008
Posted:
12122 messages
Followed by:
1237 members
5254
GMAT Score:
770
LUANDATO wrote:

What is the perimeter of the figure above? (Note, figure not necessarilly drawn to scale).

A) 155.
B) 185.
C) 220.
D) 235.
E) 250.
Let's start by adding an auxiliary line that divides the shape into 2 pieces that we can work with (rectangle and right triangle)...

Let x = length of 3rd side of the right triangle...

Since the highlighted triangle is a RIGHT TRIANGLE, we can apply the Pythagorean Theorem.
We get: x² + 40² = 50²
Evaluate to get: x² + 1600 = 2500
So, x² = 900, which means x = 30

Alternatively, we might recognize that the highlighted triangle is a version of the 3-4-5 right triangle, except the highlighted triangle is 10 TIMES bigger than the standard 3-4-5 right triangle, which means the missing side (x) has length 30.....

Now that we have all of the information we need, the perimeter = 30 + 65 + 40 + 65 + 50 = 250

_________________
Brent Hanneson – Creator of GMATPrepNow.com
Use our video course along with

And check out all of our free resources

GMAT Prep Now's comprehensive video course can be used in conjunction with Beat The GMAT’s FREE 60-Day Study Guide and reach your target score in 2 months!

### Top First Responders*

1 Jay@ManhattanReview 81 first replies
2 Brent@GMATPrepNow 71 first replies
3 fskilnik 55 first replies
4 GMATGuruNY 37 first replies
5 Rich.C@EMPOWERgma... 16 first replies
* Only counts replies to topics started in last 30 days
See More Top Beat The GMAT Members

### Most Active Experts

1 fskilnik

GMAT Teacher

202 posts
2 Brent@GMATPrepNow

GMAT Prep Now Teacher

163 posts
3 Scott@TargetTestPrep

Target Test Prep

118 posts
4 Jay@ManhattanReview

Manhattan Review

94 posts
5 Max@Math Revolution

Math Revolution

94 posts
See More Top Beat The GMAT Experts