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- ...ing countries of the problems of the [[International Mathematical Olympiad|IMO]]. * [[1959 IMO]] (in Romania)36 KB (4,083 words) - 20:48, 8 December 2024
- ...is a method to express [[angles]] that can be very useful in angle chasing problems where there are configuration issues. ...h>180^{\circ}</math>, taking half of a directed angle may cause unexpected problems.4 KB (657 words) - 19:52, 25 December 2024