GMATprep - quadrilateral

This topic has expert replies
User avatar
Community Manager
Posts: 789
Joined: Sun Jan 28, 2007 3:51 pm
Location: Silicon valley, California
Thanked: 30 times
Followed by:1 members

GMATprep - quadrilateral

by jayhawk2001 » Sat Jun 16, 2007 2:36 pm
OA after a few reply. Please provide explanations.

Is the measure of one of the interior angles of a quadrilateral ABCD equal
to 60 degrees?

(1) Two of the interior angles of ABCD are right angles

(2) The degree measure of angle ABC is twice the degree measure of angle
BCD

User avatar
Master | Next Rank: 500 Posts
Posts: 400
Joined: Sat Mar 10, 2007 4:04 am
Thanked: 1 times
Followed by:1 members

Re: GMATprep - quadrilateral

by f2001290 » Sun Jun 17, 2007 7:59 am
jayhawk2001 wrote:OA after a few reply. Please provide explanations.

Is the measure of one of the interior angles of a quadrilateral ABCD equal
to 60 degrees?

(1) Two of the interior angles of ABCD are right angles

(2) The degree measure of angle ABC is twice the degree measure of angle
BCD
1. Quad can be a rectangle or 90,90,120,60 - Insufficient
2. Insufficient

1 & 2 => 90,90,120,60 or 90,90,45,135 => Hence E