MathDB

4

Part of 1990 Dutch Mathematical Olympiad

Problems(1)

regular 7-gon

Source: Netherlands 1990

6/27/2009
If ABCDEFG ABCDEFG is a regular 7 7-gon with side 1 1, show that: \frac{1}{AC}\plus{}\frac{1}{AD}\equal{}1.
geometry proposedgeometry