Difference between revisions of "2007 AMC 12B Problems/Problem 11"

(New page: The angles in a quadrilateral add up to 360, regardless of what shape or size the figure takes. Let x be <A, so then: <B=.5x <C=(1/3)x <D=(1/4)x <A+<B+<C+<D=360 x+.5x+(1/3)x+(1/4)x=360 (2...)
 
(Redirected page to 2007 AMC 10B Problems/Problem 15)
 
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#REDIRECT [[2007 AMC 10B Problems/Problem 15]]
The angles in a quadrilateral add up to 360, regardless of what shape or size the figure takes. Let x be <A, so then:
 
<B=.5x
 
<C=(1/3)x
 
<D=(1/4)x
 
<A+<B+<C+<D=360
 
x+.5x+(1/3)x+(1/4)x=360
 
(25/12)x=360
 
x=172.8
 
or
 
x is around 173, choice D.
 

Latest revision as of 16:22, 5 June 2011