Mathematical and Physical Journal
for High Schools
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Problem C. 821. (October 2005)

C. 821. A unit square ABCD is rotated about its vertex C through 90o. Determine the area swept out by the side AB.

(5 pont)

Deadline expired on November 15, 2005.

Sorry, the solution is available only in Hungarian. Google translation




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.

Problems in Mathematics of KöMaL, October 2005