ray CD

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ray CD

by kanha81 » Thu Jun 11, 2009 1:42 pm
In the attached figure, if ray CD rotated 35 counterclockwise, what will be the value of the ratio (m DCB) : (m ACD)?

A) 5/36
B) 7/36
C) 1/3
D) 1/2
E) 2/3

A relatively simple problem, what I couldn't understand was should I subtract or add the 35 from the angle of DCB?

Just realized posted in wrong FORUM. Sorry, Moderators, please move this thread to Problem Solving area!
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by ssmiles08 » Thu Jun 11, 2009 1:49 pm
I think you add 35.

so it 60/120= 1/2

clockwise moves towards B; (think of ray CD as hand on the clock...so its moving from 12 to 1 to 2 to 3)

anti clockwise moves towards A