Mathematical and Physical Journal
for High Schools
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Problem C. 1262. (December 2014)

C. 1262. Prove that if a cyclic quadrilateral has an inscribed circle and a right angle, then it is symmetrical.

(5 pont)

Deadline expired on January 12, 2015.


169 students sent a solution.
5 points:91 students.
4 points:16 students.
3 points:9 students.
2 points:15 students.
1 point:29 students.
0 point:7 students.
Unfair, not evaluated:2 solutionss.

Problems in Mathematics of KöMaL, December 2014