It is currently 24 Mar 2019, 05:12

### 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

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

# The area of

Author Message
TAGS:
Moderator
Joined: 18 Apr 2015
Posts: 5888
Followers: 96

Kudos [?]: 1154 [0], given: 5471

The area of [#permalink]  09 Jun 2018, 08:37
Expert's post
00:00

Question Stats:

99% (00:32) correct 0% (00:00) wrong based on 7 sessions
Attachment:

#GREpracticequestion The area of triangle OPQ.jpg [ 14.44 KiB | Viewed 67 times ]

The area of $$\Delta OPQ$$ is the figure above is

A. 6

B. 12

C. 14

D. 21

E. 42
[Reveal] Spoiler: OA

_________________
GRE Forum Moderator
Joined: 29 May 2018
Posts: 125
Followers: 0

Kudos [?]: 85 [0], given: 4

Re: The area of [#permalink]  09 Jun 2018, 11:17
Carcass wrote:
Attachment:
triangle.jpg

The area of \Delta OPQ is the figure above is

A. 6

B. 12

C. 14

D. 21

E. 42

Simplest formula , when triangle has (0,0) as its one of its vertices then other two sides (a,b) and (c,d) are considered.

In our case ( 2,7 ) as (a,b) and (6,0) as (c,d).

then formula for triangle area is = |ad - bc | / 2 => | 0 - 42 | / 2 => 21.

Option D.
Moderator
Joined: 18 Apr 2015
Posts: 5888
Followers: 96

Kudos [?]: 1154 [0], given: 5471

Re: The area of [#permalink]  09 Jun 2018, 11:21
Expert's post
Elegant solution but you waste time during the exam, performing such process. However, it is not wrong at all, though.

$$A= \frac{b*h}{2}$$

$$\frac{7*6}{2} = \frac{42}{2} = 21$$

_________________
Re: The area of   [#permalink] 09 Jun 2018, 11:21
Display posts from previous: Sort by