Problem C. 821. (October 2005)
C. 821. A unit square ABCD is rotated about its vertex C through 90^{o}. Determine the area swept out by the side AB.
(5 pont)
Deadline expired on 15 November 2005.
Sorry, the solution is available only in Hungarian. Google translation
Megoldás:
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Statistics:
>608 students sent a solution.  
5 points:  437 students. 
4 points:  44 students. 
3 points:  23 students. 
2 points:  9 students. 
0 point:  50 students. 
Unfair, not evaluated:  45 solutions. 
