I am having a problem related to length contraction.  Picture a 1 meter stick in the S' frame moving at .8c, at an angle of 60 degrees relative to its velocity of .8c in the S' frame what is its length at rest?

I get 1m*cos(60 degrees) =.5 for one leg and the other as 1m*sin(60)= sqrt{3}/2 and sqrt{(.5^2)+(sqrt{3}/2}2} =1 ; where the answer is 91.7 cm.  What am I doing wrong I am going nuts.