BALTIC-WAY 2011 Problem 12

Let $P$ be a point inside a square $ABCD$ such that $PA:PB:PC$ is $1:2:3$ . Determine the angle $\angle BPA$ .

Dataset text AI-MO AoPS. 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.