NL-NWO 1990 Problem 4

If $ABCDEFG$ is a regular $7$ -gon with side $1$ , show that: $\frac{1}{AC}+\frac{1}{AD}=1$ .

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.