Historical chapter — outside the current JEE Main unit list. These older questions remain available for reference.
Appeared 19 times across 11 years of JEE Main papers — about 1.7 questions a year. Every one of them is below, with a full worked solution.
We have the frequency data for Properties of Triangle but haven’t run its papers through the pipeline yet. The 19 questions above are counted from official answer keys; the worked solutions follow once each one clears verification.