OBM 1994 Problem 6
A triangle has semi-perimeter , circumradius and inradius . Show that it is right-angled iff .
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.
Similar problems
These problems have the most words in common with this statement.