def face_adjacency_radius(self):
        """
        The approximate radius of a cylinder that fits inside adjacent faces.

        Returns
        ------------
        radii : (len(self.face_adjacency),) float
          Approximate radius formed by triangle pair
        """
        radii, span = graph.face_adjacency_radius(mesh=self)
        self._cache['face_adjacency_span'] = span
        return radii
The approximate radius of a cylinder that fits inside adjacent faces.

        Returns
        ------------
        radii : (len(self.face_adjacency),) float
          Approximate radius formed by triangle pair