  For two non-congruent regular polygons of the same type, the method of
finding the points in the plane at the equal distances to the vertices, is
established. The existence of two points with this property is proved for two
polygons with a shared vertex. For one of them, it is proved that it satisfies
the Bottema theorem conditions and based on this, the generalized Bottema
theorem for any two regular polygons is given.
