JBMO 2021 Problem 3
- Paper
Let be an acute scalene triangle with circumcenter . Let be the foot of the altitude from to the side . The lines and intersect at . Let be the line through perpendicular to . The line intersects and at and , respectively. Denote by the circumcircle of triangle . Line intersects again at .
Prove that and the circumcircles of triangles and have a common point.
Dataset text NuminaMath olympiads. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.