mathematics

This topic has expert replies
Newbie | Next Rank: 10 Posts
Posts: 6
Joined: Tue Aug 22, 2017 7:46 am
Thanked: 1 times

mathematics

by Diophantus » Sun Sep 24, 2017 5:32 pm
Find the angle which is equal to four times its complement

Master | Next Rank: 500 Posts
Posts: 415
Joined: Thu Oct 15, 2009 11:52 am
Thanked: 27 times

by regor60 » Mon Sep 25, 2017 10:00 am
Diophantus wrote:Find the angle which is equal to four times its complement
OK

Let X be the angle, therefore, 90-X is its complement

X= 4(90-X)

5X = 360

X=72

Check: complement of 72 degree angle is 18 degrees. Is 4*18 = 72 ? > yes

GMAT Instructor
Posts: 2630
Joined: Wed Sep 12, 2012 3:32 pm
Location: East Bay all the way
Thanked: 625 times
Followed by:119 members
GMAT Score:780

by Matt@VeritasPrep » Tue Sep 26, 2017 5:40 pm
Not really a GMAT question though :)