2013 USAMO

Day 1

Problem 1

In triangle $ABC$, points $

Solution

Problem 2

Solution

Problem 3

Solution

Day 2

Problem 4

Solution

Problem 5

Solution

Problem 3

Solution

See Also

2013 USAMO (ProblemsResources)
Preceded by
2012 USAMO
Followed by
2014 USAMO
1 2 3 4 5 6
All USAMO Problems and Solutions