coordinate geo MGMAT...

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rommysingh: Master | Next Rank: 500 Posts; Posts: 112; Joined: Thu Mar 22, 2012 9:33 amFollowed by: 1 member; Thanked: 1 times

by rommysingh » Fri Sep 11, 2015 12:11 pm

A triangle in the xy-coordinate plane has vertices with coordinates (7, 0), (0, 8), and (20, 10). What is the area of this triangle?
72
80
87
96
100

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Source: Beat The GMAT — Problem Solving | Fri Sep 11, 2015 12:11 pm

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Fri Sep 11, 2015 12:21 pm

Hint: https://www.beatthegmat.com/coordinate-p ... 63268.html

Brent Hanneson - Creator of GMATPrepNow.com

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[email protected]: Elite Legendary Member; Posts: 10392; Joined: Sun Jun 23, 2013 6:38 pmFollowed by: 511 members; Location: Palo Alto, CA; Thanked: 2867 times; GMAT Score:800

by [email protected] » Fri Sep 11, 2015 9:54 pm

Hi rommysingh,

From what you've told me, you haven't done much (if any) Geometry-focused studying yet, so you should not be worrying about this type of question just yet. It's based on general graphing rules (and the idea that ANY diagonal line can be 'turned into' a right triangle. The key to most 'graphing' questions is to physically draw whatever information you've been given, then use whatever graphing/geometry rules are applicable to answer the given question.

GMAT assassins aren't born, they're made,
Rich

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